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

### Instruction:
Name the rank on channel for january 21, 2011

### Inputs:
table_name: table, columns: ['Episode number (Production number)', 'Title', 'Original air date', 'Total viewers on FX', 'Total viewers on FX+', 'Total viewers', 'Rank on channel']

### Response:
SELECT Rank on channel FROM table WHERE Original air date = January 21, 2011