Query error: EndPointInternalError: The endpoint returned the HTTP status code 500. Response: b'\n{ "head": { "link": [], "vars": ["subject", "predicate", "object"] },\n "results": { "distinct": false, "ordered": true, "bindings": [\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "http://www.w3.org/2000/01/rdf-schema#label" }\t, "object": { "type": "literal", "value": "Postage stamps of the USSR" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/countryOfOrigin" }\t, "object": { "type": "uri", "value": "https://gptkb.org/entity/Soviet_Union" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/currency" }\t, "object": { "type": "literal", "value": "ruble" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/currency" }\t, "object": { "type": "literal", "value": "kopeck" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/depicts" }\t, "object": { "type": "uri", "value": "https://gptkb.org/entity/art" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/depicts" }\t, "object": { "type": "uri", "value": "https://gptkb.org/entity/historical_event" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/depicts" }\t, "object": { "type": "literal", "value": "animals" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/depicts" }\t, "object": { "type": "literal", "value": "sports" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/depicts" }\t, "object": { "type": "literal", "value": "space exploration" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/depicts" }\t, "object": { "type": "literal", "value": "landscapes" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/depicts" }\t, "object": { "type": "literal", "value": "Soviet achievements" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/depicts" }\t, "object": { "type": "literal", "value": "Soviet leaders" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/firstIssueDate" }\t, "object": { "type": "literal", "value": "1923" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/instanceOf" }\t, "object": { "type": "uri", "value": "https://gptkb.org/entity/post_office" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/issuedBy" }\t, "object": { "type": "uri", "value": "https://gptkb.org/entity/Soviet_Union" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/language" }\t, "object": { "type": "uri", "value": "https://gptkb.org/entity/Russian" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableCollection" }\t, "object": { "type": "literal", "value": "yes" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/producedBy" }\t, "object": { "type": "uri", "value": "https://gptkb.org/entity/Goznak" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/usedFor" }\t, "object": { "type": "uri", "value": "https://gptkb.org/entity/post_office" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/bfsLayer" }\t, "object": { "type": "literal", "value": "7" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/bfsParent" }\t, "object": { "type": "uri", "value": "https://gptkb.org/entity/Aleksey_Shchusev" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/finalDate" }\t, "object": { "type": "literal", "value": "1991" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "uri", "value": "https://gptkb.org/entity/Airmail_stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "uri", "value": "https://gptkb.org/entity/Charity_stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Commemorative issues" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Definitive issues" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Lenin centenary stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "October Revolution stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Agriculture stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Anniversary of October Revolution stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Anniversary stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Architecture stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Army stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Art stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Aviation stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Children\'s stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Cinema stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Constitution stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Cosmonauts stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Education stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Fauna stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Flora stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Folk Art stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Friendship stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Heroes stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Industry stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet International Relations stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Inventions stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Lenin Prize stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Literature stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Maritime stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Medical stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Monuments stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Music stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Nature Protection stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Olympic stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Order of Alexander Nevsky stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Order of Bogdan Khmelnitsky stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Order of Friendship of Peoples stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Order of Glory stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Order of Kutuzov stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Order of Labour Glory stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Order of Lenin stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Order of Maternal Glory stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Order of Nakhimov stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Order of Suvorov stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Order of Ushakov stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Order of Victory stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Order of the Badge of Honour stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Order of the 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"https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Order of the Red Star stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Peace stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Philatelic Exhibitions stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Polar Exploration stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Postal History stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Red Army stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Red Cross stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Science and Technology stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Science stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Space Dogs stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Spacecraft stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Sports stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Theatre stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Transport stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Wildlife stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet World War II stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Soviet Youth stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Space exploration stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableSeries" }\t, "object": { "type": "literal", "value": "Victory Day stamps" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Postage_stamps_of_the_USSR" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/philatelicSociety" }\t, "object": { "type": "literal", "value": "All-Union Society of Philatelists" }} ] } }Virtuoso S1TAT Error RC...: Returning incomplete results, query interrupted by result timeout. Activity: 200 rnd 95 seq 0 same seg 67 same pg 27 same par 0 disk 0 spec disk 0B / 0 messa\n\nSPARQL query:\n\n SELECT ?subject ?predicate ?object\n WHERE {\n ?subject ?predicate ?object .\n FILTER (STR(?subject) = "https://gptkb.org/entity/Postage_stamps_of_the_USSR")\n }\n '