174064
Since recreational diving is the natural source of future technical divers , the DIR philosophy was extended into this field , although the recreational practices were already considered acceptably low risk by most diver certification agencies and insurance companies .
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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:
 None