Question: What is the brand of the guitar played by the composer of "Incantation Bulgaria"?
Answer(s):
answer: Ibanez

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.0zh5z8x . 
?c ns:music.guitarist.guitars_played ?x .
?x ns:common.topic.notable_types ns:m.05czz29 .
}