CREATE TABLE table_12678 ("Tries" FLOAT, "Player" CLOB, "Opponent" CLOB, "Score" CLOB, "Venue" CLOB, "Round" CLOB)

Who is the opponent of the match at cua stadium?
SELECT "Opponent" FROM table_12678 WHERE "Venue" = 'cua stadium'
SELECT "Opponent" FROM "table_12678" WHERE "Venue" = 'cua stadium'