For the nationality of FIN and the points of 418.8 what is the overall wc points?
CREATE TABLE "planica" (
  "rank" real,
  "name" text,
  "nationality" text,
  "1st_m" text,
  "2nd_m" text,
  "points" text,
  "overall_wc_points_rank" text
);
SELECT "overall_wc_points_rank" FROM "planica" WHERE "nationality"='FIN' AND "points"='418.8';