Question: What theme song is written by the person who plays a character called Dr. Roskin?
Answer(s):
answer: Facts of Life
answer: The Facts of Life
answer: Hockey Sock Rock
answer: It Takes Diff'rent Strokes
answer: Arnold & Willy (Diff'rent Strokes)
answer: Big Wheels

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:film.actor.film ?k .
?k ns:film.performance.character ns:m.0h2z61r . 
?c ns:music.composer.compositions ?x .
}