76898
The strongest influence on the " Book of Optics " was from Ptolemy 's " Optics " , while the description of the anatomy and physiology of the eye was based on Galen 's account .
 person: Ptolemy; person: Galen
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: Ptolemy, Galen 
Answer:
 person: Ptolemy; person: Galen