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The reaction of of antimatter with of matter would produce ( 180 petajoules ) of energy ( by the mass–energy equivalence formula , ) , or the rough equivalent of 43 megatons of TNT – slightly less than the yield of the 27,000 " kg Tsar Bomba , the largest thermonuclear weapon ever detonated .
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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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