user: Question: How long is "Harvest"?
Columns: ['Song', 'Performer', 'Original artist', 'Length', 'Recorded']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['"Out on the Weekend"', 'Girls in Hawaii', 'Neil Young', '3:30', '4/19/06']
SQL:

assistant: SELECT "Length" FROM "Table" WHERE "Song" = '"Harvest"';