Question: What the parents' names of the artist that recorded "We Can Change the World" the music video?
Answer(s):
answer: Harry Mendler
answer: Leah Mendler

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.featured_artist.recordings ns:m.012b0yxn . 
?c ns:people.person.parents ?x .
}