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Hundreds of tanks , armored personnel carriers , Humvees and trucks were lined up in parallel columns waiting in single - file to cross the Iraqi - Kuwait border .
 Iraqi, Kuwait, personnel, Hundreds of tanks , armored personnel carriers , Humvees and trucks, tanks, armored personnel carriers, Humvees, trucks, the Iraqi - Kuwait border
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, Kuwait, personnel, Hundreds of tanks , armored personnel carriers , Humvees and trucks, tanks, armored personnel carriers, Humvees, trucks, the Iraqi - Kuwait border