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First created by King Chulalongkorn ( Rama V ) in 1886 , for his son Prince Maha Vajirunhis , the king 's eldest son by a royal wife Queen Savang Vadhana .
 Chulalongkorn, Maha Vajirunhis, Savang Vadhana
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Chulalongkorn, Maha Vajirunhis, Savang Vadhana