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_34 (date VARCHAR, winning_constructor VARCHAR, winning_driver VARCHAR)

### Question ###
Which Date has a Winning constructor of fiat and a Winning driver of louis wagner?

### Accurate SQL ###

SELECT date FROM table_name_34 WHERE winning_constructor = "fiat" AND winning_driver = "louis wagner"