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_47 ( class VARCHAR, wins VARCHAR, points VARCHAR, year VARCHAR )

### Question ###
Which class corresponds to more than 2 points, wins greater than 0, and a year earlier than 1973?

### Accurate SQL ###

SELECT class FROM table_name_47 WHERE points > 2 AND year < 1973 AND wins > 0