CREATE TABLE table_9998 ("Date" CLOB, "Round" CLOB, "Opponent" CLOB, "Venue" CLOB, "Result" CLOB, "Attendance" FLOAT)

Who was the opponent in the round of R2?
SELECT "Opponent" FROM table_9998 WHERE "Round" = 'r2'
SELECT "Opponent" FROM "table_9998" WHERE "Round" = 'r2'