Question: American singer Steve Earle has released how many studio albums, including a collaboration with bluegrass artist Del McCoury, Delano Floyd McCoury was born in Bakersville, North Carolina in 1939, but the family relocated to York County, Pennsylvania while he was still a child, is an American bluegrass musician?
Sentence (from "Del McCoury"): As leader of the Del McCoury Band, he plays guitar and sings lead vocals along with his two sons, Ronnie McCoury and Rob McCoury, who play mandolin and banjo respectively.
Relevant evidence: No