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While Sub-Zero and many of the more humanoid characters were created using " Mortal Kombat " s trademark of digitizing live actors , many of the more ominous enemies as well as all of the backgrounds were done in real time 3D .
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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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