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He finally went up to Oxford in 1919 , graduating with a first class degree in 1921 and being elected a fellow at philosophy tutor at his college two years later , getting to know CS Lewis ( though Lewis described Weldon as quick to anger and cynical ) .
 organization: Oxford; person: CS Lewis; person: Lewis; person: Weldon
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: Oxford, CS Lewis, Lewis, Weldon 
Answer:
 organization: Oxford; person: CS Lewis; person: Lewis; person: Weldon