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It became the main branch of the Taklung in Kham and , according to Go Lotsawa , the author of the Blue Annals , it once had as many as 2,000 monks , and held the greatest reputation among Khampa monasteries .
 Go Lotsawa
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Go Lotsawa