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In his near 50-year career , Humphreys was estimated to have announced over 20,000 boxing matches and officiated many of the top prize fights of the era as the longtime official ring announcer at the old Madison Square Garden from 1925 up to his death in 1936 .
 person: Humphreys
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: Humphreys 
Answer:
 person: Humphreys