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?

Context paragraphs:
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.  He was an SS-"Obergruppenführer und General der Polizei" (Senior Group Leader and General of Police) as well as chief of the Reich Main Security Office (including the Gestapo, Kripo, and SD).  He was also "Stellvertretender Reichsprotektor" (Deputy/Acting Reich-Protector) of Bohemia and Moravia.  Heydrich served as president of the International Criminal Police Commission (ICPC; later known as Interpol) and chaired the January 1942 Wannsee Conference, which formalised plans for the Final Solution to the Jewish Question—the deportation and genocide of all Jews in German-occupied Europe.

Operation Anthropoid Memorial: The Operation Anthropoid Memorial is a monument in Libeň, Prague that commemorates Operation Anthropoid, an ambush on senior Nazi official Reinhard Heydrich by Czechoslovakian partisans on 27 May 1942 which resulted in his death one week later.

HHhH (film): HHhH (in some markets titled The Man with the Iron Heart) is a French biographical war thriller drama film directed by Cédric Jimenez and written by David Farr, Audrey Diwan, and Jimenez.  It is based on French writer Laurent Binet's novel "HHhH", and focuses on "Operation Anthropoid", the assassination of Nazi leader Reinhard Heydrich in Prague during World War II.

HHhH: HHhH is the debut novel of French author Laurent Binet, released in 2010 by Grasset & Fasquelle.  The novel recounts Operation Anthropoid, the assassination of Nazi leader Reinhard Heydrich in Prague during World War II.  The novel was awarded the 2010 Prix Goncourt du Premier Roman.

Jozef Gabčík: Jozef Gabčík (] ; 8 April 1912 – 18 June 1942) was a Slovak soldier in the Czechoslovak army involved in Operation Anthropoid, the assassination of acting Reichsprotektor (Reich-Protector) of Bohemia and Moravia, SS Obergruppenführer Reinhard Heydrich.

Anthropoid (film): Anthropoid is a 2016 British epic war film directed by Sean Ellis, written by Ellis and Anthony Frewin and starring Cillian Murphy, Jamie Dornan, Charlotte Le Bon, Anna Geislerová, Harry Lloyd, and Toby Jones.  It tells the story of Operation Anthropoid, the World War II assassination of Reinhard Heydrich by Exile Czechoslovak soldiers on 27 May 1942.

Josef Valčík: Josef Valčík (2 November 1914 – 18 June 1942) was a Czechoslovak military soldier and resistance fighter during the German occupation of Czechoslovakia.  He was born in Valašské Klobouky.  He is remembered for his participation in Operation Anthropoid in 1942, the assassination of Reinhard Heydrich, German SS-Obergruppenführer and Deputy/Acting Reich-Protector of Bohemia and Moravia.

Posen Conference: The Posen Conference was a meeting attended by Reichsführer Heinrich Himmler, high-ranking German Nazi Party officials and Gauleiters on October 6, 1943 in the city of Posen in Reichsgau Posen (Poznań, Poland).  Similar to his speech of two days earlier, Himmler clearly explained in the final speech of the day the nature of the Final Solution, its implications for those present, and its long-term significance for Germany.

Operation Anthropoid: Operation Anthropoid was the code name for the assassination of Schutzstaffel (SS)-"Obergruppenführer" and "General der Polizei" Reinhard Heydrich, head of the "Reichssicherheitshauptamt" (Reich Main Security Office, RSHA), the combined security services of Nazi Germany, and acting "Reichsprotektor" of the Protectorate of Bohemia and Moravia.  The operation was carried out in Prague on 27 May 1942 after having been prepared by the British Special Operations Executive with the approval of the Czechoslovak government-in-exile.  Wounded in the attack, Heydrich died of his injuries on 4 June 1942.  His death led to a wave of merciless reprisals by German SS troops, including the destruction of villages and the killing of civilians.  Anthropoid was the only successful assassination of a senior Nazi leader during World War II.

Atentát: Atentát (english title: "The Assassination") is a 1964 black-and-white Czechoslovak war film directed by Jiří Sequens.  The World War II story depicts events before and after the assassination of top German leader Reinhard Heydrich in Prague (Operation Anthropoid).  The film was entered into the 4th Moscow International Film Festival where it won a Golden Prize.  To this days the film "Atentát" is considered by Czech historians as the historically most accurate depiction of the events surrounding the Operation Anthropoid.

Supporting paragraphs: Josef Valčík Reinhard Heydrich
Answer: January 1942 Wannsee Conference