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_18602462_21 ( round_of_32 VARCHAR, round_of_16 VARCHAR )

### Question ###
When in round of 16 it was did not advance what was it in round of 32?

### Accurate SQL ###

SELECT round_of_32 FROM table_18602462_21 WHERE round_of_16 = "Did not advance"