Question: Which city is the hometown of the main subject of the film The Secret Life of Leonardo Da Vinci?
Answer(s):
answer: Vinci

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ?c)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
?c ns:film.film_subject.films ns:m.0crtkth . 
?c ns:people.person.place_of_birth ?x .
}