Question: Who was the director of the 1944 British musical comedy film starring "the Forces' Sweetheart"?
Sentence (from "Vera Lynn"): Dame Vera Margaret Lynn, {'1': ", '2': ", '3': ", '4': "} (née Welch; born 20 March 1917), widely known as "the Forces' Sweetheart", is an English singer of traditional pop, songwriter and actress, whose musical recordings and performances were enormously popular during the Second World War.
Relevant evidence: Yes