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?
{'answer': 'sixteen', 'supporting_facts': [['Steve Earle discography', 0], ['Del McCoury', 0]]}