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Life Manfred Niekisch studied biology at the University of Cologne/DE and obtained his PhD ( Dr. rer .
 Manfred Niekisch, University of Cologne/DE
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Manfred Niekisch, University of Cologne/DE