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This definition has been criticized by Kevin Kelly who believe such a principle is ill-defined So rather than conceived as imposing no change until proof of safety is produced , this definition of the precautionary principle is meant to legitimate protective measures , attempting to avoid the desire of a technology 's advocates to delay legislation until irrefutable evidence of harm can be produced .
 person: Kevin Kelly
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
 Entities: Kevin Kelly 
Answer:
 person: Kevin Kelly