4019
He also ( when grown up ) begs the Supreme Commander 's eldest son ( Yeon Namsaeng ) to allow him to join the martial arts contest because the reward is emancipation ( freedom ) , but he refuses .
 Yeon Namsaeng
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Yeon Namsaeng