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At least two of the cellphone calls made by passengers indicate that all the hijackers they saw were wearing red bandanas , which some have questioned may have signified an allegiance to the Egyptian Islamic Jihad .
 Egyptian Islamic Jihad
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Egyptian Islamic Jihad