user: Question: What was the rank when the opponent was Wisconsin (played at Wisconsin)?
Columns: ['Date', 'Opponent#', 'Rank #', 'Site', 'Result', 'Attendance']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['September 26', 'Texas A&M', '1', 'Ohio Stadium • Columbus, OH', 'W56-13', '85,657']
SQL:

assistant: SELECT "Rank #" FROM "Table" WHERE "Opponent#" = 'at Wisconsin';