user: Question: What song had an index of M6?
Columns: ['Index', 'Name', 'Song', 'Group Song', 'Score']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['M1', 'Isaac 张富泷', '爱爱爱', '杀手', '6.0 + 6.0 + 6.0 + 6.5 = 24.5']
SQL:

assistant: SELECT "Song" FROM "Table" WHERE "Index" = 'M6';