user: Question: What is Song, when Weeks on Top is 1,  and when Volume:Issue is 15:6?
Columns: ['Volume:Issue', 'Issue Date(s)', 'Weeks on Top', 'Song', 'Artist']
Types: ['text', 'text', 'real', 'text', 'text']
Sample row: ['14:18-22', '19 December 1970 - 16 January 1971', 5.0, '" Isn\'t It a Pity "', 'George Harrison']
SQL:

assistant: SELECT "Song" FROM "Table" WHERE "Weeks on Top" = 1.0 AND "Volume:Issue" = '15:6';