Question: What party that authored Liberal policy in 1953 did Winston Churchill belong to?
Answer(s):
answer: Liberal Party

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.082xp)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.082xp ns:government.politician.party ?y .
?y ns:government.political_party_tenure.party ?x .
?x ns:book.author.works_written ns:m.066xh9m . 
}