what is the earliest winter olympics when the fis nordic world ski championships is 1976?
CREATE TABLE "women_s_10_km" (
  "winner" text,
  "country" text,
  "winter_olympics" real,
  "fis_nordic_world_ski_championships" text,
  "holmenkollen" text
);
SELECT MIN("winter_olympics") FROM "women_s_10_km" WHERE "fis_nordic_world_ski_championships"='1976';