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The current library building was designed by renowned prairie school architect William Eugene Drummond and was constructed in 1928-1929 .
 person: William Eugene Drummond
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: William Eugene Drummond 
Answer:
 person: William Eugene Drummond