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Its hierarchy is composed of metropolitan bishops and diocesan bishops , while lower clergy consists of priests and deacons , who serve in dioceses ( eparchies ) and parishes throughout the Middle East , India , North America , Oceania , and Europe ( including the Caucasus and Russia ) .
 Middle East, India, North America, Oceania, Europe, Caucasus, Russia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Middle East, India, North America, Oceania, Europe, Caucasus, Russia