Question: What movie about math did Ron Howard direct?
Answer(s):
answer: A Beautiful Mind

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.0g2lq)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.0g2lq ns:film.actor.film ?y .
?y ns:film.performance.film ?x .
?x ns:film.film.directed_by ns:m.0g2lq .
?x ns:film.film.subjects ns:m.04rjg . 
}