Question: What poet influenced the lyricist of "Street Scene: Act I. No. 6b Quartet"?
Answer(s):
answer: Walt Whitman

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.lyricist.lyrics_written ns:m.0_74_pw . 
?c ns:influence.influence_node.influenced_by ?x .
}