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J. W. Tutt was the first to come up with natural selection as an explanation , and stated in 1894 that the phenomenon was due to selective predation by birds .
 J. W. Tutt
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 J. W. Tutt