CREATE TABLE table_204_922 (id DECIMAL, "rank" DECIMAL, "nation" TEXT, "gold" DECIMAL, "silver" DECIMAL, "bronze" DECIMAL, "total" DECIMAL)

what country scored the top number of bronze medals in taekwondo at the 2013 bolivarian games ?
SELECT "nation" FROM table_204_922 ORDER BY "bronze" DESC LIMIT 1
SELECT "nation" FROM "table_204_922" ORDER BY "bronze" DESC NULLS LAST LIMIT 1