Question: Rusty Day was best known for his work with an American musician who was the guitarist, vocalist, and wongeriter for what Southern Rock Band?
Sentence (from "Steve Gaines"): He is best known as a guitarist, vocalist and songwriter of Southern rock band Lynyrd Skynyrd from May 11, 1976 until his death on October 20, 1977 and is the younger brother of Cassie Gaines, who was a back up vocalist for the band's live performances.
Relevant evidence: Yes