user: Question: What team was the opponent on 09/20/1975?
Columns: ['Date', 'Opponent', 'Location', 'Result', 'Attendance']
Types: ['text', 'text', 'text', 'text', 'real']
Sample row: ['09/06/1975', 'SMU', 'Groves Stadium • Winston-Salem, NC', 'L 7-14', 13400.0]
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Date" = '09/20/1975';