Question: Which of Michael Jackson's brothers or sisters had a concert tour named Rock Witchu Tour?
Answer(s):
answer: Janet Jackson

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.09889g)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.09889g ns:people.person.sibling_s ?y .
?y ns:people.sibling_relationship.sibling ?x .
?x ns:music.artist.concert_tours ns:m.04660jw . 
}