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Most of his early works were commercial art projects but he also contributed to a number of exhibitions , and was invited to participate in the design of Man and His World , the Czech pavilion at the 1967 World Expo in Montreal .
 None
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:  
Answer:
 None