Question: Which Kennedy kids served in the Democratic Party?
Answer(s):
answer: Ted Kennedy
answer: Robert F. Kennedy
answer: John F. Kennedy

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.01qlg1)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.01qlg1 ns:people.person.children ?x .
?x ns:government.politician.party ?c .
?c ns:government.political_party_tenure.party ns:m.0d075m . 
}