Task: Explanation
Input (English): Unit 731 (Japanese: 731部隊 , Hepburn: Nana-san-ichi Butai ) was a covert biological and chemical warfare research and development unit of the Imperial Japanese Army that undertook lethal human experimentation during the Second Sino-Japanese War (1937–1945) of World War II. It was responsible for some of the most notorious war crimes carried out by Japan. Unit 731 was based at the Pingfang district of Harbin, the largest city in the Japanese puppet state of Manchukuo (now Northeast China). Question: What month did the unit of the Imperial Japanese Army that undertook lethal human experimentation during the Second Sino-Japanese War got pardon? Answer: September
Output (English): Unit 731 Japanese: 731部隊 , Hepburn: Nanasanichi Butai  was a covert biological and chemical warfare research and development unit of the Imperial Japanese Army that undertook lethal human experimentation during the Second SinoJapanese War 1937–1945 of World War II.