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Joan Ridder Challinor is the former chairperson of the National Commission on Libraries and Information Science in the United States .
 person: Joan; person: Challinor; organization: National Commission on Libraries and Information Science; location: United States
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: Joan, Challinor, National Commission on Libraries and Information Science, United States 
Answer:
 person: Joan; person: Challinor; organization: National Commission on Libraries and Information Science; location: United States