5910
The experiment in Ecuador is being watched closely not only by the United States , which receives a certain benefit from the increased demand for dollars , but by other nations in the region .
 Ecuador, the United States
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: date, organization, person, geographical social political, national religious political, facility, cardinal, location, work of art, law, event, product, ordinal, percent, time, quantity, money, language 
Text: {0} 
Answer:
 Ecuador, the United States