Question: In what bands did the composer of "Poor Willie" play?
Answer(s):
answer: Parliament
answer: Dolby's Cube
answer: The Parliaments
answer: George Clinton & Bootsy Collins
answer: Parliament-Funkadelic
answer: Funkadellic

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:music.composer.compositions ns:m.04133x9 . 
?c ns:music.group_member.membership ?y .
?y ns:music.group_membership.group ?x .
}