Question: Franklin Delano Roosevelt Wakefield, is an innovative American player, of which instrument, in the bluegrass music style, Wakefield is known for his collaborations with a number of important and well-known bands, including The Stanley Brothers?
Sentence (from "Frank Wakefield"): Franklin Delano Roosevelt Wakefield (born June 26, 1934) is an innovative American mandolin player in the bluegrass music style.
Relevant evidence: Yes