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

### Instruction:
Performer 3 of paul merton, and a Performer 4 of sandi toksvig is which performer 1?

### Inputs:
table_name: table, columns: ['Date', 'Episode', 'Performer 1', 'Performer 2', 'Performer 3', 'Performer 4']

### Response:
SELECT Performer 1 FROM table WHERE Performer 3 = paul merton AND Performer 4 = sandi toksvig