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Astute politicians , the Kings of Derge maintained political power through generous patronage of religious institutions : their unusual pattern of patronage for all five schools of Buddhism meant strong support for monasteries , learning and art in the area under their political control .
 Derge, five schools of Buddhism
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Derge, five schools of Buddhism