52810
He violated his parole by visiting India for religious study in 1987 – 1988 , which led to his final prison term , in federal prison , in 1990 .
 India
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:
 India