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_68066 ( "Name" text, "Circuit" text, "Date" text, "Winning driver" text, "Winning constructor" text, "Report" text )

### Question ###
Which driver won when the winning constructor was bugatti at the Boulogne Grand Prix ?

### Accurate SQL ###

SELECT "Winning driver" FROM table_68066 WHERE "Winning constructor" = 'bugatti' AND "Name" = 'boulogne grand prix'