user: Question: what is the nme of the song performed by Billy Vaughn?
Columns: ['Position', 'Artist', 'Song title', 'Highest position', 'Points']
Types: ['real', 'text', 'text', 'real', 'real']
Sample row: [1.0, 'The Kingston Trio', '" Tom Dooley "', 1.0, 465.0]
SQL:

assistant: SELECT "Song title" FROM "Table" WHERE "Artist" = 'Billy Vaughn';