What is the rank of rider gary johnson, who had a speed of 120.979 mph?
CREATE TABLE "race_2_1000cc_superbike_race_final_stand" (
  "rank" real,
  "rider" text,
  "team" text,
  "time" text,
  "speed" text
);
SELECT "rank" FROM "race_2_1000cc_superbike_race_final_stand" WHERE "speed"='120.979 mph' AND "rider"='gary johnson';