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Groups such as the al-Nusra Front and the Islamic State of Iraq and the Levant have recruited many foreign Mujahideen to train and fight in what has gradually become a highly sectarian war .
 al-Nusra Front, Islamic State of Iraq and the Levant, Mujahideen
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 al-Nusra Front, Islamic State of Iraq and the Levant, Mujahideen