4289
UK " close " to identifying man shown in Islamic State video of killing of James Foley , UK ambassador to US says http://t.co/e7KA4kDSw9
 UK, Islamic State, James Foley, UK, US
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 UK, Islamic State, James Foley, UK, US