What is the Date, when the Sport is luge - men's doubles, and when the Record is, "start"?
CREATE TABLE "track_records" (
  "sport" text,
  "record" text,
  "nation_athlete_s" text,
  "date" text,
  "time_seconds" real
);
SELECT "date" FROM "track_records" WHERE "sport"='luge - men''s doubles' AND "record"='start';