20549
According to the International Mathematical Union citation , he was awarded the prize " for developing powerful new methods in the geometry of numbers , which he applied to count rings of small rank and to bound the average rank of elliptic curves " .
 International Mathematical Union
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 International Mathematical Union