Question: Who were the main characters of the film Victoria the Great's parents?
Answer(s):
answer: Prince Edward, Duke of Kent and Strathearn
answer: Princess Victoria of Saxe-Coburg-Saalfeld

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.02rbsv4 . 
?c ns:people.person.parents ?x .
}