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

### Instruction:
What date did the episode with a weekly ranking of 14 air?

### Inputs:
table_name: table, columns: ['Episode No.', 'Airdate', 'Total Viewers', 'Share', 'BBC One Weekly Ranking']

### Response:
SELECT Airdate FROM table WHERE BBC One Weekly Ranking = 14