Question: Who dated the performer who headlined the concert tour called Demi World Tour?
Answer(s):
answer: Nicholas Braun
answer: Joe Jonas
answer: Cody Linley

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.010pzj9k . 
?c ns:base.popstra.celebrity.dated ?y .
?y ns:base.popstra.dated.participant ?x .
}