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Instead , what is featured is several scenarios pitting one Empire against another , and the main campaign , where the player can choose one of three factions : The Kra ' hen Empire , The Shinari Republic , or The Solarian Federation .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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