What is Term Start, when Born-Died is Prime Ministers 1939 - 1943?
CREATE TABLE "1939_1943" (
  "name" text,
  "born_died" text,
  "term_start" text,
  "term_end" text,
  "political_party" text
);
SELECT "term_start" FROM "1939_1943" WHERE "born_died"='prime ministers 1939 - 1943';