user: ### NOW ANSWER:
Question: What was the Attendance on September 26, 1971?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 19, 1971', 'San Francisco 49ers', 'W 20-17', 56990.0]
SQL:

assistant: SELECT AVG("Attendance") FROM "Table" WHERE "Date" = 'September 26, 1971';