5006
The U . S . and Iran will start a new round of negotiations this week over the future of Iran 's nuclear program . http://t.co/kvI5n3UalZ
 U . S ., Iran, Iran
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 U . S ., Iran, Iran