Question: "Foil" is a song by an American singer whose favored instrument is what?
Sentence (from "&quot;Weird Al&quot; Yankovic"): Alfred Matthew "Weird Al" Yankovic ( ; born October 23, 1959) is an American singer, songwriter, parodist, record producer, satirist, actor, voice actor, music video director, film producer, and author.
Relevant evidence: Yes