20980
After two years of imprisonment in Warsaw Citadel , he was in 1914 sentenced to 7 years of exile , and sent to the prison in Oryol .
 Warsaw Citadel, Oryol
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Warsaw Citadel, Oryol