Question: What character in Star Wars was played by the the actor who played the character Grace Cahill?
Answer(s):
answer: Padmé Amidala

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.actor.film ?k .
?k ns:film.performance.character ns:m.07yj1_p . 
?c ns:film.actor.film ?y .
?y ns:film.performance.character ?x .
?y ns:film.performance.film ns:m.0ddt_ .
}