159984
As for a change he was exceptionally assigned to touring the USA , year 2000 , for a series on the American society , between the Bill Clinton and George W. Bush eras .
 USA, Bill Clinton, George W. Bush
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 USA, Bill Clinton, George W. Bush