Question: Of the movies that Ron Howard directed, that is about boxing?
Answer(s):
answer: Cinderella Man

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.director.film ?x .
?x ns:film.film.subjects ns:m.01cgz . 
}