Question: What is the founding year of the brewery that produces Pilsner Urquell?
SPARQL:
PREFIX dbp: <http://dbpedia.org/property/> PREFIX res: <http://dbpedia.org/resource/> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> SELECT ?num WHERE { res:Pilsner_Urquell dbp:brewery ?uri . ?uri dbp:foundation ?num . OPTIONAL { ?uri rdfs:label ?string. FILTER (lang(?string) = 'en') } }