7559
A U.S.-led air force has protected Iraqi Kurds against attack from Baghdad since shortly after the Gulf War in 1991 .
 Iraqi Kurds, Gulf War, U.S.-led, Baghdad
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, else, organization, person 
Text: {0} 
Answer:
 Iraqi Kurds, Gulf War, U.S.-led, Baghdad