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Allegedly , in 1784 after Yi Sung-hun was baptized in Beijing , he came to Seoul and baptized Yi Byuk in the personal home of Kim Pom-u at the present site of Myeongdong Cathedral .
 Yi Sung-hun, Beijing, Seoul, Yi
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Yi Sung-hun, Beijing, Seoul, Yi