What is the fastest lap for a season smaller than 1979?
CREATE TABLE "champions" (
  "season" real,
  "series_name" text,
  "champion" text,
  "races" text,
  "pole_positions" text,
  "wins" text,
  "podiums" text,
  "fastest_laps" text,
  "points" text,
  "margin_pts" text
);
SELECT "fastest_laps" FROM "champions" WHERE "season"<1979;