On what date was the first match for the competition that ended its last match on December 16, 2007?
CREATE TABLE "overall" (
  "competition" text,
  "started_round" text,
  "final_position" text,
  "final_round" text,
  "first_match" text,
  "last_match" text
);
SELECT "first_match" FROM "overall" WHERE "last_match"='december 16, 2007';