Query error: EndPointInternalError: The endpoint returned the HTTP status code 500. Response: b'Virtuoso S1T00 Error SR171: Transaction timed out\n\nSPARQL query:\n\n SELECT ?subject ?object\n WHERE {\n ?subject <https://gptkb.org/prop/EDT_%EA%B8%B0%EA%B0%84> ?object .\n }'