221990
Prunus sargentii , commonly known as Sargent 's cherry or North Japanese hill cherry , is a species of cherry native to Japan , Korea , and Sakhalin ( Russia ) .
 Sargent, Japan, Russia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Sargent, Japan, Russia