Question: Which music albums contain the song Last Christmas?
SPARQL query:
PREFIX foaf: <http://xmlns.com/foaf/0.1/> PREFIX onto: <http://dbpedia.org/ontology/> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> SELECT DISTINCT ?uri ?string WHERE { ?single onto:album ?uri . ?single foaf:name 'Last Christmas'@en . OPTIONAL { ?uri rdfs:label ?string . FILTER (lang(?string) = 'en') } }