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_26914854_3 (incoming_manager VARCHAR, date_of_vacancy VARCHAR)

### Question ###
Who is the incoming manager when the date of vacancy was 21 march 2011?

### Accurate SQL ###

SELECT incoming_manager FROM table_26914854_3 WHERE date_of_vacancy = "21 March 2011"