user: Question: What team was the Opponent when the Score was 31-6?
Columns: ['Date', 'Opponent', 'Result', 'Score', 'Record', 'attendance']
Types: ['text', 'text', 'text', 'text', 'text', 'real']
Sample row: ['09/28/1952', 'at San Francisco 49ers', 'Loss', '13-17', '0-1-0', 54761.0]
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Score" = '31-6';