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Marc Amsler ( born February 5 , 1891 in Vevey , Switzerland ; died May 3 , 1968 ) was a professor of ophthalmology at der Zurich Eye Clinic at the University of Zurich .
 Marc Amsler, Vevey, Switzerland, Zurich, University of Zurich
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Marc Amsler, Vevey, Switzerland, Zurich, University of Zurich