37671
His style followed Huang Gongwang , and he was close with Song Xu and Sun Kehong .
 Huang Gongwang, Song Xu, Sun Kehong
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Huang Gongwang, Song Xu, Sun Kehong