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From 1966 until 1984 the obverse featured the portrait of Queen Elizabeth II by Arnold Machin .
 person: Elizabeth II; person: Arnold Machin
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: Elizabeth II, Arnold Machin 
Answer:
 person: Elizabeth II; person: Arnold Machin