Question: Who was the grandson of the man about whom the movie "David's father" was written?
Answer(s):
answer: Jesse

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.0bg79_0 . 
?c ns:people.person.parents ?x .
?x ns:people.person.gender ns:m.05zppz .
}