Question: What is the son's name of Heart of Stone Tour's artist?
Answer(s):
answer: Elijah Blue Allman
answer: Chaz Bono

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.artist.concert_tours ns:m.02qfctl . 
?c ns:people.person.children ?x .
?x ns:people.person.gender ns:m.05zppz .
}