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With the new ownership of Roman Abramovich , and the club 's centenary approaching , combined with demands from fans for the popular 1950 s badge to be restored , it was decided that the crest should be changed again in 2005 .
 Roman Abramovich
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Roman Abramovich