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

### Instruction:
Who was team 1 when the chalkheads were team 2?

### Inputs:
table_name: table, columns: ['Episode #', 'Air date', 'Team 1', 'Players left after Round 1', 'Team 2']

### Response:
SELECT Team 1 FROM table WHERE Team 2 = Chalkheads