Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_24 ( date_of_vacancy VARCHAR, team VARCHAR, date_of_appointment VARCHAR )

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

### Accurate SQL ###

SELECT date_of_vacancy FROM table_name_24 WHERE team = "fc bayern munich" AND date_of_appointment = "27 april 2009"