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The Siege of Baghdad was the last Seljuq attempt to capture Baghdad from the Abbasids .
 Baghdad, Seljuq, Baghdad, Abbasids
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Baghdad, Seljuq, Baghdad, Abbasids