Question: What office did Paul Wellstone held that consists of two houses in Congress?
Answer(s):
answer: United States Senate

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.07t31)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.07t31 ns:government.governmental_body.component_bodies ?x .
?x ns:government.governmental_body.members ?c .
?c ns:government.government_position_held.office_holder ns:m.010ngb . 
}