What is the Race on July 30, 1950 with a Formula 2 Fia, non-championship?
CREATE TABLE "geneva_race_track_switzerland" (
  "date" text,
  "race" text,
  "race_track" text,
  "category" text,
  "lap_length" text
);
SELECT "race" FROM "geneva_race_track_switzerland" WHERE "category"='formula 2 fia, non-championship' AND "date"='july 30, 1950';