Question: Who sings the song what does the fox say?
Disambiguated questions and answers: question: Who is the music group that sings the song what does the fox say?
Who are the singers that sing the song what does the fox say?
answer: Ylvis
Vegard Ylvisåker
Vegard and Bård Ylvisåker
Bård Ylvisåker
Natural Questions answer: Norwegian comedy duo Ylvis (from the Wikipedia article "The Fox (What Does the Fox Say?)")