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An aggressive fighter , Petrosyan began training in Muay Thai after moving to Italy from Armenia and became a two-time Italian champion and a European titlist before arriving on the world stage in 2010 when he took back-to-back wins over Vuyisile Colossa and Dzhabar Askerov and later appeared as a competitor on the Enfusion reality television show .
 Italy, Armenia, Vuyisile Colossa, Dzhabar Askerov
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Italy, Armenia, Vuyisile Colossa, Dzhabar Askerov