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The Post Office at Kilmore East opened on 1 September 1872 as Gavan Duffy , named after Sir Charles Gavan Duffy the Premier of Victoria until June of that year .
 Gavan Duffy, Sir Charles Gavan Duffy, Victoria
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Gavan Duffy, Sir Charles Gavan Duffy, Victoria