Which nation won the boxing championship in 2012?
CREATE TABLE "list_of_winners" (
  "year" real,
  "fighter" text,
  "nation_represented" text,
  "sport" text,
  "sanctioning_body_or_league" text,
  "weight_class_represented_or_contested" text
);
SELECT "nation_represented" FROM "list_of_winners" WHERE "year"=2012;