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_38 ( time_retired VARCHAR, laps VARCHAR, grid VARCHAR, manufacturer VARCHAR )

### Question ###
What time/retired for a grid less than 19, under 21 laps, and made by aprilia?

### Accurate SQL ###

SELECT time_retired FROM table_name_38 WHERE grid < 19 AND manufacturer = "aprilia" AND laps < 21