Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Who was the opponent when they played at the legion field • birmingham, al site?

### Inputs:
table_name: table, columns: ['Date', 'Opponent', 'Site', 'Result', 'Attendance']

### Response:
SELECT Opponent FROM table WHERE Site = legion field • birmingham, al