90159
However , some researchers do not discount the possibility that manti may have originated in the Middle East and spread eastward to China and Korea through the Silk Road .
 Middle East, China, Korea, Silk Road
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Middle East, China, Korea, Silk Road