CREATE TABLE table_name_21 (host_team VARCHAR, stadium VARCHAR, final_score VARCHAR)

Who was the host team at Louisiana Superdome when the final score was 10-20?
SELECT host_team FROM table_name_21 WHERE stadium = "louisiana superdome" AND final_score = "10-20"
SELECT "host_team" FROM "table_name_21" WHERE "10-20" = "final_score" AND "louisiana superdome" = "stadium"