CREATE TABLE table_69919 ("Deputy Prime Minister" TEXT, "Took office" FLOAT, "Left office" TEXT, "Prime Minister" TEXT, "Term" TEXT, "Party" TEXT)

Which deputy prime minister left office in 1981?
SELECT "Deputy Prime Minister" FROM table_69919 WHERE "Left office" = '1981'
SELECT "Deputy Prime Minister" FROM "table_69919" WHERE "Left office" = '1981'