CREATE TABLE table_54191 ("Season" CLOB, "Competition" CLOB, "Round" CLOB, "Opponent" CLOB, "Result" CLOB, "Venue" CLOB)

Which opponent has a Season of 2011/12?
SELECT "Opponent" FROM table_54191 WHERE "Season" = '2011/12'
SELECT "Opponent" FROM "table_54191" WHERE "Season" = '2011/12'