CREATE TABLE table_16655 ("Season" TEXT, "Group A Winner" TEXT, "Group B Winner" TEXT, "Group C Winner" TEXT, "Group D Winner" TEXT)

What group a winner was for nocerina?
SELECT "Group A Winner" FROM table_16655 WHERE "Group D Winner" = 'Nocerina'
SELECT "Group A Winner" FROM "table_16655" WHERE "Group D Winner" = 'Nocerina'