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Answer: Context: The Nanking Massacre was an episode of mass murder and mass rape committed by Japanese troops against the residents of Nanjing ("Nanking"), then the capital of the Republic of China, during the Second Sino-Japanese War. The massacre is also known as the Rape of Nanking or, using Pinyin romanization, the Nanjing Massacre or Rape of Nanjing.

Hypothesis: The Nanking Massacre was one of the worst events in history.

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Answer: Context: Superior is a town in and the county seat of Mineral County, Montana, United States. The population was 812 at the 2010 census. Superior was named after its founders' hometown of Superior, Wisconsin in 1869. The post office was established in 1871 after Mineral County became the site of one of the largest gold strikes that helped settle the West.

Hypothesis: The Post Office was important for Mineral County

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Answer: Context: More of Tom Lehrer was the second studio album recorded by musical satirist Tom Lehrer. The LP contains the same songs (in the same sequence) as the live album "An Evening Wasted with Tom Lehrer", which was recorded and released earlier in the same year. The album was recorded and mixed in a single three-hour session at the RCA Studios in New York on July 8, 1959.

Hypothesis: The album was recorded at RCA studios

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Answer:
Context: Masako Sen ( , Sen Masako , born 23 October 1951) , formerly Princess Masako of Mikasa ( , Masako Naishinno ) , is the fourth child and second daughter of Takahito, Prince Mikasa and Yuriko, Princess Mikasa. She married Soshitsu Sen on 14 October 1983. As a result, she gave up her imperial title and left the Japanese Imperial Family, as required by law.

Hypothesis: Masako Sen has been married for 46 years.