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_21 (number_of_seats INTEGER, current_status VARCHAR, quantity VARCHAR)

### Question ###
What is the smallest number of seats in a vehicle currently retired and in quantities less than 8?

### Accurate SQL ###

SELECT MIN(number_of_seats) FROM table_name_21 WHERE current_status = "retired" AND quantity < 8