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Willis Stanley Blatchley ( 6 October 1859 , North Madison , Connecticut - 28 May 1940 , Indianapolis , Indiana ) was an American entomologist , malacologist and geologist .
 Willis, Blatchley, North Madison, Indianapolis, Indiana, American
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Willis, Blatchley, North Madison, Indianapolis, Indiana, American