CREATE TABLE table_31570 ("Number" FLOAT, "Minister" TEXT, "Took office" TEXT, "Left office" TEXT, "Government" TEXT, "Party" TEXT)

Who is the mInister who left office during 1960?
SELECT "Minister" FROM table_31570 WHERE "Left office" = '1960'
SELECT "Minister" FROM "table_31570" WHERE "Left office" = '1960'