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Edgar Argent Ross ( 20 November 1904 – 16 November 2001 ) was an Australian journalist , trade unionist and communist organiser .
 person: Edgar; person: Ross
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: Edgar, Ross 
Answer:
 person: Edgar; person: Ross