user: Question: Who was the opponent when the attendance was 87,453?
Columns: ['Date', 'Opponent#', 'Rank #', 'Site', 'Result', 'Attendance']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['September 15', 'Minnesota', '3', 'Ohio Stadium • Columbus, OH', 'W56-7', '86,005']
SQL:

assistant: SELECT "Opponent#" FROM "Table" WHERE "Attendance" = '87,453';