20188
Genghis Khan frequently acquired wives and concubines from empires and societies that he had conquered , these women were often princesses or queens that were taken captive or gifted to him .
 Genghis Khan
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Genghis Khan