CREATE TABLE table_24309 ("Competition" CLOB, "Round" CLOB, "Opponent" CLOB, "Result" CLOB, "Score" CLOB, "Home/Away" CLOB, "Venue" CLOB, "Attendance" CLOB, "Date" CLOB)

Who is the opponent when the attendance is n/a?
SELECT "Opponent" FROM table_24309 WHERE "Attendance" = 'N/A'
SELECT "Opponent" FROM "table_24309" WHERE "Attendance" = 'N/A'