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For semisimple p-adic Lie groups , the theory of zonal spherical functions and Hecke algebras was first developed by Satake and Ian G. Macdonald .
 person: Ian G. Macdonald
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: Ian G. Macdonald 
Answer:
 person: Ian G. Macdonald