Question: Who wrote the book The pillars of the Earth?
SPARQL:
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> PREFIX onto: <http://dbpedia.org/ontology/> SELECT ?uri ?string WHERE { ?books rdf:type onto:Book . ?books onto:author ?uri . ?books rdfs:label 'The Pillars of the Earth'@en . OPTIONAL {?uri rdfs:label ?string . FILTER (lang(?string) = 'en') } }