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History and classification Doctors Michael S. Engel and Dong Ren first studied and described Ororaphidia and the co-occurring Styporaphidia and in 2008 , publishing a formal description in the Journal of the Kansas Entomological Society volume 81 .
 Michael S. Engel
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Michael S. Engel