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On this Ala-ud-Daulah Mirza marched from Herat with his army and besieged Balkh in the winter of 1447 C.E. Abdal-Latif Mirza sent a letter to his father Ulugh Beg for reinforcements .
 person: Mirza; location: Herat; location: Balkh; person: Abdal-Latif Mirza; person: Ulugh Beg
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Mirza; location: Herat; location: Balkh; person: Abdal-Latif Mirza; person: Ulugh Beg