4708
This aspect was first explored by Johan Huizinga ( in " Homo Ludens " , 1938 ) and Roger Caillois ( in " Man , Play and Games " , 1958 ) .
 person: Johan Huizinga; person: Roger Caillois
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: Johan Huizinga, Roger Caillois 
Answer:
 person: Johan Huizinga; person: Roger Caillois