Question: Josef Valčík is remembered for his participation in Operation Anthropoid in 1942, the assassination of a high-ranking German Nazi official who chaired what?
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