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Introduction to Epigenetics The mechanisms governing phenotypic plasticity , or the capacity of a cell to change its state in response to stimuli , have long been the subject of research ( Phenotypic plasticity 1 ) .
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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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