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Fission products Many artificial radionuclide s of technological importance are produced as fission products within nuclear reactor s. A fission product is a nucleus with approximately half the mass of a uranium or plutonium nucleus which is left over after such a nucleus has been " split " in a nuclear fission reaction .
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Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities:  
Answer:
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