. . . . "This query returns all datasets attributed to Leiden University." . . . "Get datasets attributed to Leiden University" . . "prefix prov: \r\nprefix schema: \r\nprefix rdfs: \r\nprefix dct: \r\nprefix np: \r\nprefix npa: \r\nprefix npx: \r\n\r\nselect distinct ?dataset ?label ?repository where {\r\n graph npa:graph {\r\n ?np npa:hasValidSignatureForPublicKey ?pubkey .\r\n filter not exists { ?npx npx:invalidates ?np ; npa:hasValidSignatureForPublicKey ?pubkey . }\r\n ?np dct:created ?date .\r\n ?np np:hasAssertion ?a .\r\n ?np np:hasProvenance ?p .\r\n }\r\n graph ?a {\r\n ?dataset a .\r\n optional { ?dataset dct:title ?label . }\r\n optional { ?dataset schema:maintainer ?repository . }\r\n }\r\n graph ?p {\r\n ?a prov:wasAttributedTo .\r\n }\r\n}" . . "Tobias Kuhn" . "2025-04-16T13:00:36.581Z"^^ . . . . . . . . . "RSA" . "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQD4Wj537OijfOWVtsHMznuXKISqBhtGDQZfdO6pbb4hg9EHMcUFGTLbWaPrP783PHv8HMAAPjvEkHLaOHMIknqhaIa5236lfBO3r+ljVdYBElBcLvROmwG+ZGtmPNZf7lMhI15xf5TfoaSa84AFRd5J2EXekK6PhaFQhRm1IpSYtwIDAQAB" . "oSBiJSDORNu+hQaILwoh/PiDXY7HWUu8H1y3lwD3aaavJN4GEgeJGZSFly1zXYhjbqYkL0pq0m8C7CdSjyIcIMpZCJoVHIymuL3B3d1r/wHKcDVyAz/LS+yvZKQ5wOYJppum6ZNsp5sZ+TolFK8lqjaxyehlmwP5xQC+rbRMb+Q=" . . .