6454
The central reference point for the entire 15th century is a Siamese intervention of some undisclosed nature at the capital Yasodharapura ( Angkor Thom ) around the year 1431 .
 Yasodharapura, Angkor Thom
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Yasodharapura, Angkor Thom