When was the first HC climb before 2013 with more than 3 times visited, more than 4 HC climbs, and a height of 1669?
CREATE TABLE "tour_de_france" (
  "height_m" text,
  "no_of_times_visited" real,
  "no_of_hc_climbs" real,
  "first_time_as_hc_climb" real,
  "most_recent" real
);
SELECT "first_time_as_hc_climb" FROM "tour_de_france" WHERE "no_of_times_visited">3 AND "no_of_hc_climbs"=4 AND "most_recent"<2013 AND "height_m"='1669';