CREATE TABLE table_46081 ("Name" TEXT, "Born-Died" TEXT, "Term start" TEXT, "Term end" TEXT, "Political Party" TEXT)

What is Term Start, when Born-Died is Prime Ministers 1939 - 1943?
SELECT "Term start" FROM table_46081 WHERE "Born-Died" = 'prime ministers 1939 - 1943'
SELECT "Term start" FROM "table_46081" WHERE "Born-Died" = 'prime ministers 1939 - 1943'