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

### Instruction:
What is the date of vacancy of team fc bayern munich, which had a date of appointment on 27 April 2009?

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

### Response:
SELECT Date of vacancy FROM table WHERE Team = fc bayern munich AND Date of appointment = 27 april 2009