10388
The Mongols massacred most of the city 's inhabitants , including the caliph Al-Musta ' sim , and destroyed large sections of the city .
 person: Al-Musta ' sim
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: Al-Musta ' sim