user: Question: What opponent had a game with more than 50705 in attendace on September 13, 1982?
Columns: ['Week', 'Date', 'Opponent', 'Result', 'Game site', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'September 13, 1982', 'Pittsburgh Steelers', 'L 28–36', 'Texas Stadium', 63431.0]
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Attendance" > 50705.0 AND "Date" = 'September 13, 1982';