user: Question: How many seasons have a sacks of 39?
Columns: ['Season', 'Points per Game', 'Total Yards per Game', 'Rushing Yards per Game', 'Passing Yards per Game', 'Sacks', 'Interceptions']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Season', 'Points per Game', 'Total Yards per Game', 'Rushing Yards per Game', 'Passing Yards per Game', 'Sacks', 'Interceptions']
SQL:

assistant: SELECT COUNT("Season") FROM "Table" WHERE "Sacks" = '39';