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Marks attended Yale University from 1911 to 1915 then served as an officer in the United States Marine Corps during World War I , receiving the Silver Star and two Purple Heart s. After the war , in 1923 , he earned his PhD at the University of Chicago in History , writing his dissertation on the Spanish-American War .
 person: Marks; organization: Yale University; organization: United States Marine Corps; organization: University of Chicago
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: Marks, Yale University, United States Marine Corps, University of Chicago 
Answer:
 person: Marks; organization: Yale University; organization: United States Marine Corps; organization: University of Chicago