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William Rainey Harper became the first President of the University of Chicago in 1891 and its first classes were held in 1892 .
 person: William Rainey Harper
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: William Rainey Harper 
Answer:
 person: William Rainey Harper