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Joan Rivers remains in ' serious condition ' after surgery , family says http://t.co/m8e0dJtk2l
 person: Joan Rivers
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: Joan Rivers 
Answer:
 person: Joan Rivers