CREATE TABLE table_16654 ("Season" TEXT, "Group A Winner" TEXT, "Group B Winner" TEXT, "Group C Winner" TEXT, "Group D Winner" TEXT)

What is the group a winner for vis pesaro?
SELECT "Group A Winner" FROM table_16654 WHERE "Group C Winner" = 'Vis Pesaro'
SELECT "Group A Winner" FROM "table_16654" WHERE "Group C Winner" = 'Vis Pesaro'