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?
{'answer': 'January 1942 Wannsee Conference', 'supporting_facts': [['Josef Valčík', 0], ['Josef Valčík', 2], ['Reinhard Heydrich', 0], ['Reinhard Heydrich', 3]]}