56794
A series of courts-martial began on 2 May , in which 187 people were tried , most of them at Richmond Barracks .
 Richmond Barracks
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:
 Richmond Barracks