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For example , the age of fossils is based on radiometric dating , which is justified by reasoning that radioactive decay follows a Poisson process rather than a Bernoulli process .
 Poisson, Bernoulli
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Poisson, Bernoulli