Task: Question Answering
Input (English): passage: ``Doubleback'' is a song by ZZ Top from their album Recycler, which was featured in the film Back to the Future Part III. The band had a cameo in the movie playing a hillbilly music version of the song along with some local musicians. The regular version of the song plays over the credits.
 question: did zz top play in back to the future 3?
Output (English): Yes