166471
Babur Mirza had been preparing for an invasion of Khurasan well before the invasion of Ulugh Beg in that region .
 Babur Mirza, Khurasan, Ulugh Beg
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Babur Mirza, Khurasan, Ulugh Beg