43772
He seemed to have left the defense of his kingdom to his son Belshazzar ( a capable soldier but poor diplomat who alienated the political elite ) , occupying himself with the more congenial work of excavating the foundation records of the temples and determining the dates of their builders .
 Belshazzar
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Belshazzar