CREATE TABLE table_name_9 (apparatus VARCHAR, rank_final VARCHAR, competition_description VARCHAR)

What is Apparatus, when Rank-Final is greater than 6, and when Competition Description is 'U.S. Championships'?
SELECT apparatus FROM table_name_9 WHERE rank_final > 6 AND competition_description = "u.s. championships"
SELECT "apparatus" FROM "table_name_9" WHERE "competition_description" = "u.s. championships" AND "rank_final" > 6