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

### Instruction:
What is Replaced By, when Date of Vacancy is "23 February 2009"?

### Inputs:
table_name: table, columns: ['Team', 'Outgoing manager', 'Manner of departure', 'Date of vacancy', 'Replaced by', 'Date of appointment']

### Response:
SELECT Replaced by FROM table WHERE Date of vacancy = 23 february 2009