CREATE TABLE table_4313 ("Portfolio" CLOB, "Minister" CLOB, "Took office" CLOB, "Left office" CLOB, "Party" CLOB)

Tell me the left office for mirko tremaglia
SELECT "Left office" FROM table_4313 WHERE "Minister" = 'mirko tremaglia'
SELECT "Left office" FROM "table_4313" WHERE "Minister" = 'mirko tremaglia'