Question: Give me all launch pads operated by NASA.
SPARQL:
PREFIX dbo: <http://dbpedia.org/ontology/> PREFIX res: <http://dbpedia.org/resource/> PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> SELECT DISTINCT ?uri ?string WHERE { ?uri rdf:type dbo:LaunchPad . ?uri dbo:operator res:NASA . OPTIONAL { ?uri rdfs:label ?string. FILTER (lang(?string) = 'en') } }