Question: Who wrote the lyrics for the Polish national anthem?
SPARQL:
PREFIX dbo: <http://dbpedia.org/ontology/> PREFIX dbp: <http://dbpedia.org/property/> PREFIX res: <http://dbpedia.org/resource/> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> SELECT DISTINCT ?uri ?string WHERE { res:Poland dbo:anthem ?x . ?x dbp:author ?uri . OPTIONAL { ?uri rdfs:label ?string. FILTER (lang(?string) = 'en') } }