5824
Bred in the  United States  by Gretchen and Roy Jackson owners of 2006 Kentucky Derby winner Barbaro  George Washington  had a stellar season to be the top 3-year-old in 2006 .
 country of birth: United States, George Washington
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: cities of residence, top members employees, members, alternate names, origin, state or provinces of residence, title of person, spouse, city of headquarters, NA, founded by, state or province of headquarters, employee of, countries of residence, country of birth, founded, subsidiaries, country of headquarters 
Text: {0} 
 Entity Pairs:  United States, George Washington 
Answer:
 country of birth: United States, George Washington