. . . . "This query returns all projects attributed to Leiden University." . . . "Get projects 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 ?project ?project_label ?np (\"^\" as ?np_label) 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 ?project a .\r\n optional { ?project rdfs:label ?project_label . }\r\n }\r\n graph ?p {\r\n ?a prov:wasAttributedTo .\r\n }\r\n}" . . "Tobias Kuhn" . "2026-01-14T14:38:58.903Z"^^ . . . . . . . . . "RSA" . "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQD4Wj537OijfOWVtsHMznuXKISqBhtGDQZfdO6pbb4hg9EHMcUFGTLbWaPrP783PHv8HMAAPjvEkHLaOHMIknqhaIa5236lfBO3r+ljVdYBElBcLvROmwG+ZGtmPNZf7lMhI15xf5TfoaSa84AFRd5J2EXekK6PhaFQhRm1IpSYtwIDAQAB" . "7FiO4gZPZR2i6suyrCyoKzuv49e83cuI/3VbuV/nMmnXboC5uUnD2+SlNeMl+YvKD16fKjkp6iO7DG2Cjaiul6L9ej22EO7coNiXS+Ik9eCjqVOCR8VSzPtRDuvJiA+OQptjZLx+oVBMNfJmXCwON6EJTLJl9/6y7eGwzIUoI1Y=" . . .