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For observational data , the derivation of confidence intervals must use " subjective " models , as emphasized by Ronald Fisher and his followers .
 person: Ronald Fisher
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: Ronald Fisher 
Answer:
 person: Ronald Fisher