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After a brief spell as an assistant master at Marlborough College he returned to Corpus as tutor in 1879 , then became college librarian in 1895 ( looking after the Parker library ) , and president from 1913 until his death in 1921 .
 organization: Marlborough College; organization: Corpus; organization: Parker library
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: Marlborough College, Corpus, Parker library 
Answer:
 organization: Marlborough College; organization: Corpus; organization: Parker library