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Schreck continued his studies at Colorado State , receiving his Ph.D. in Physiology , Biophysics , and Fisheries science ( 1972 ) co-supervised by Dr. M. Lloyd Hopwood and Dr. Robert J. Behnke .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities:  
Answer:
 None