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