user: Question: What was the lowest attendance at a week 15 game?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 4, 1988', 'at Los Angeles Raiders', 'L 24–13', 39029.0]
SQL:

assistant: SELECT MIN("Attendance") FROM "Table" WHERE "Week" = 15.0;