Question: Was Marie Curie a doctoral student of Henri Becquerel?
SPARQL query: ASK WHERE { <http://dbpedia.org/resource/Henri_Becquerel> <http://dbpedia.org/ontology/doctoralStudent> <http://dbpedia.org/resource/Marie_Curie> }
Answer: [Yes], Marie Curie was a doctoral student of Henri Becquerel.