61882
He attended military preparatory schools and graduated from the 23rd class of the Imperial Japanese Army Academy in December 1911 , specializing in cavalry operations .
 Imperial Japanese Army Academy
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Imperial Japanese Army Academy