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His great-uncles Matrika Prasad Koirala and Girija Prasad Koirala also served terms as Nepal 's prime ministers .
 Matrika Prasad Koirala, Girija Prasad Koirala
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Matrika Prasad Koirala, Girija Prasad Koirala