16667
According to his text , silkworm eggs , mulberry trees and weaving techniques passed from Khotan to India , and from there eventually reached Europe .
 Khotan, India, Europe
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Khotan, India, Europe