user: Question: What Site has Attendance of 53,000, and a Date of October 21, 1967?
Columns: ['Date', 'Opponent', 'Site', 'Result', 'Attendance']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['September 23, 1967', 'Oklahoma State', 'War Memorial Stadium • Little Rock, AR', 'L6–7', '53,000']
SQL:

assistant: SELECT "Site" FROM "Table" WHERE "Attendance" = '53,000' AND "Date" = 'October 21, 1967';