Question: Which organizations were founded in 1930?
SPARQL query:
PREFIX onto: <http://dbpedia.org/ontology/>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
SELECT DISTINCT ?uri 
WHERE {
        ?uri rdf:type onto:Organisation .
      { ?uri onto:formationYear ?date . }
      UNION 
      { ?uri onto:foundingYear ?date. }
      FILTER regex(?date,'^1930') . 
}