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On the protective side , nuclear law has two distinct aspects — the protection against radiation hazards connected with the peaceful application of nuclear energy and radioactive substances , and the prevention of non-peaceful uses of nuclear energy by means of the safeguards system developed for that purpose .
 None
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:
 None