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 "The Stanley Brothers"): Ralph and Carter performed as The Stanley Brothers with their band, The Clinch Mountain Boys, from 1946 to 1966.
Relevant evidence: No