10195
Although he enjoyed making people laugh , he was also a serious student of comedy and history , and was interested in Sigmund Freud and Henri Bergson 's analysis of humour .
 person: Sigmund Freud; person: Henri Bergson
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: Sigmund Freud; person: Henri Bergson