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_1140116_6 ( race_name VARCHAR, winning_driver VARCHAR )

### Question ###
Which races did Paul Greifzu win?

### Accurate SQL ###

SELECT race_name FROM table_1140116_6 WHERE winning_driver = "Paul Greifzu"