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/Ian_Serraillier" }\t, "predicate": { "type": "uri", "value": "http://www.w3.org/2000/01/rdf-schema#label" }\t, "object": { "type": "literal", "value": "Ian Serraillier" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Ian_Serraillier" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/almaMater" }\t, "object": { "type": "uri", "value": "https://gptkb.org/entity/University_of_Oxford" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Ian_Serraillier" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/children" }\t, "object": { "type": "literal", "value": "4" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Ian_Serraillier" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/dateOfBirth" }\t, "object": { "type": "literal", "value": "1912-09-24" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Ian_Serraillier" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/dateOfDeath" }\t, "object": { "type": "literal", "value": "1994-11-28" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Ian_Serraillier" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/education" }\t, "object": { "type": "uri", "value": "https://gptkb.org/entity/St_Edmund_Hall%2C_Oxford" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Ian_Serraillier" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/genre" }\t, "object": { "type": "uri", "value": "https://gptkb.org/entity/children%27s_literature" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Ian_Serraillier" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/genre" }\t, "object": { "type": "literal", "value": "historical fiction" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Ian_Serraillier" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/instanceOf" }\t, "object": { "type": "uri", "value": "https://gptkb.org/entity/person" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Ian_Serraillier" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/knownFor" }\t, "object": { "type": "literal", "value": "retellings of classic legends" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Ian_Serraillier" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/language" }\t, "object": { "type": "literal", "value": "English" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Ian_Serraillier" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/nationality" }\t, "object": { "type": "literal", "value": "British" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Ian_Serraillier" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/notableWork" }\t, "object": { "type": "uri", "value": "https://gptkb.org/entity/The_Silver_Sword" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Ian_Serraillier" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/occupation" }\t, "object": { "type": "uri", "value": "https://gptkb.org/entity/educator" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Ian_Serraillier" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/occupation" }\t, "object": { "type": "uri", "value": "https://gptkb.org/entity/poet" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Ian_Serraillier" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/occupation" }\t, "object": { "type": "uri", "value": "https://gptkb.org/entity/writer" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Ian_Serraillier" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/period" }\t, "object": { "type": "literal", "value": "20th century" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Ian_Serraillier" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/placeOfBirth" }\t, "object": { "type": "uri", "value": "https://gptkb.org/entity/London%2C_England" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Ian_Serraillier" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/placeOfDeath" }\t, "object": { "type": "uri", "value": "https://gptkb.org/entity/West_Sussex%2C_England" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Ian_Serraillier" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/spouse" }\t, "object": { "type": "literal", "value": "Anne Margaret Rogers" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Ian_Serraillier" }\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/Ian_Serraillier" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/bfsParent" }\t, "object": { "type": "uri", "value": "https://gptkb.org/entity/The_Child_of_the_Moat" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Ian_Serraillier" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/bfsParent" }\t, "object": { "type": "uri", "value": "https://gptkb.org/entity/Betty_Silver" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Ian_Serraillier" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/bfsParent" }\t, "object": { "type": "uri", "value": "https://gptkb.org/entity/Nick_Willow" }} ] } }Virtuoso S1TAT Error RC...: Returning incomplete results, query interrupted by result timeout. Activity: 65 rnd 26 seq 0 same seg 11 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/Ian_Serraillier")\n }\n '