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_27383390_4 ( date_of_appointment VARCHAR, position_in_table VARCHAR )

### Question ###
When is the date of appointment when the position in table is 16?

### Accurate SQL ###

SELECT date_of_appointment FROM table_27383390_4 WHERE position_in_table = 16