what is the final-rank for the uneven bars and the competition is u.s. championships?
CREATE TABLE "2008_season" (
  "year" real,
  "competition" text,
  "location" text,
  "event" text,
  "final_rank" text,
  "final_score" text,
  "qualifying_rank" real,
  "qualifying_score" text
);
SELECT "final_rank" FROM "2008_season" WHERE "event"='Uneven Bars' AND "competition"='U.S. Championships';