CREATE TABLE table_48659 ("President" TEXT, "Vice" FLOAT, "Romanized  ( Hangul ) " TEXT, "Took office" TEXT, "Left office" TEXT, "Political party" TEXT)

When did chang myon ( ) leave office?
SELECT "Left office" FROM table_48659 WHERE "Romanized (Hangul)" = 'chang myon (장면)'
SELECT "Left office" FROM "table_48659" WHERE "Romanized (Hangul)" = 'chang myon (장면)'