62666
He became dissatisfied , however , and soon transferred to physics , where he met Felix Ehrenhaft , a physicist whose experiments influenced his later views on the nature of science .
 person: Felix Ehrenhaft
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: Felix Ehrenhaft 
Answer:
 person: Felix Ehrenhaft