Question: During what war did Herbert Melhorn serve as director of Stiftung Nordhav, an organization formed by Reinhard Heydrich, who was also a main architect of the Holocaust?
Sentence (from "Reinhard Heydrich"): Reinhard Tristan Eugen Heydrich (] ) (7 March 1904 – 4 June 1942) was a high-ranking German Nazi official during World War II, and a main architect of the Holocaust.
Relevant evidence: Yes