890
The Iraqi unit in possession of those guns fired mortars in the direction of the 7th Cavalry .
 Iraqi, The Iraqi unit in possession of those guns, the 7th Cavalry, those guns, mortars
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: organization, person, geographical social political, vehicle, location, weapon, facility 
Text: {0} 
Answer:
 Iraqi, The Iraqi unit in possession of those guns, the 7th Cavalry, those guns, mortars