Which driver won when the winning constructor was bugatti at the Boulogne Grand Prix ?
CREATE TABLE "other_grands_prix" (
  "name" text,
  "circuit" text,
  "date" text,
  "winning_driver" text,
  "winning_constructor" text,
  "report" text
);
SELECT "winning_driver" FROM "other_grands_prix" WHERE "winning_constructor"='bugatti' AND "name"='boulogne grand prix';