What is the final Vuelta position associated with a final Giro position over 39 and a final Tour position of 90?
CREATE TABLE "grand_tour_finishers" (
  "rider" text,
  "year" real,
  "final_position_giro" real,
  "final_position_tour" real,
  "final_position_vuelta" real
);
SELECT "final_position_vuelta" FROM "grand_tour_finishers" WHERE "final_position_giro">39 AND "final_position_tour"=90;