user: Question: When was the song by Andy Gibb issued?
Columns: ['Volume:Issue', 'Issue Date(s)', 'Weeks on Top', 'Song', 'Artist']
Types: ['text', 'text', 'real', 'text', 'text']
Sample row: ['26:14', '1 January', 1.0, '" Tonight\'s the Night "', 'Rod Stewart']
SQL:

assistant: SELECT "Issue Date(s)" FROM "Table" WHERE "Artist" = 'Andy Gibb';