153738
It was there that Gelfand was first exposed to the writings of Alexander Herzen as well as the revolutionary literature of the day .
 person: Alexander Herzen
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Alexander Herzen 
Answer:
 person: Alexander Herzen