27178
Church leader Hwang Sa-yeong wrote a letter that was both critical of the Joseon government and also advocated a plan to ask for a Western ship to come to Korea in an effort to aid the persecuted Catholics .
 Joseon
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Joseon