premise: Yi Bangja, Crown Princess Uimin of Korea (also "Euimin", Japanese: 李方子 "Ri Masako") (4 November 1901 – 30 April 1989) was the consort of Crown Prince Euimin of Korea. She and her husband would have been the emperor and empress of the Empire of Korea if Korea had not been annexed to the Empire of Japan in 1910.
hypothesis: Yi Bangja died when she was 50 years old.
reason: It's definitely incorrect because she was born in 1901 and died in 1989, so she must have been older than 50. It's difficult because the system has trouble identifying birth and death years I think.