which organizations were founded in 1950?
PREFIX dbo: <http://dbpedia.org/ontology/> PREFIX dbp: <http://dbpedia.org/property/> PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> SELECT DISTINCT ?uri WHERE { ?uri rdf:type dbo:Organisation { ?uri dbo:formationYear ?date } UNION { ?uri dbo:foundingYear ?date } UNION { ?uri dbp:foundation ?date } UNION { ?uri dbp:formation ?date } FILTER regex(?date, '^1950') }