when was the first performance for the ballet with peter mazurowski in the final cast?
CREATE TABLE "billy_elliot" (
  "status" text,
  "name" text,
  "first_performance" text,
  "last_performance" text,
  "style" text
);
SELECT "first_performance" FROM "billy_elliot" WHERE "style"='ballet' AND "status"='final cast' AND "name"='peter mazurowski';