91858
Since 2000 Carsten Niemitz has published a series of papers and a book on a variant of the wading hypothesis , which he calls the " amphibian generalist theory " ( ) .
 Carsten Niemitz
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Carsten Niemitz