Question: What political party was the subject of the film Gore Vidal's Lincoln belong to?
Answer(s):
answer: Republican Party
answer: Whig Party
answer: National Union Party
answer: Illinois Republican Party

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.04j21rb . 
?c ns:government.politician.party ?y .
?y ns:government.political_party_tenure.party ?x .
}