Question: What movie does Robert Pattinson play in that has a prequel called Harry Potter and the Prisoner of Azkaban?
Answer(s):
answer: Harry Potter and the Goblet of Fire

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.062dn7)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.062dn7 ns:film.actor.film ?y .
?y ns:film.performance.film ?x .
?x ns:film.film.prequel ns:m.03177r . 
}