Question: The artist of the concert tour named Rihanna: Live in Concert Tour is of what nationality?
Answer(s):
answer: Barbados

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.09g79g8 . 
?c ns:people.person.nationality ?x .
}