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/Touch-a-Truck" }\t, "predicate": { "type": "uri", "value": "https://www.w3.org/2000/01/rdf-schema#label" }\t, "object": { "type": "literal", "value": "Touch-a-Truck" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Touch-a-Truck" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/activity" }\t, "object": { "type": "literal", "value": "educational demonstrations" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Touch-a-Truck" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/activity" }\t, "object": { "type": "literal", "value": "photo opportunities" }},\n { "subject": { "type": "uri", "value": "https://gptkb.org/entity/Touch-a-Truck" }\t, "predicate": { "type": "uri", "value": "https://gptkb.org/prop/activity" }\t, "object": { "type": "literal", "value": "meeting first responders" }},\n {Virtuoso S1TAT Error RC...: Returning incomplete results, query interrupted by result timeout. Activity: 71 rnd 31 seq 0 same seg 5 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/Touch-a-Truck")\n }\n '