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The Pentagon denies US warships are steering clear of the Suez Canal in the wake of the apparent terrorist bombing of the destroyer Cole in Yemen although none has used the Canal , since the attack on the Cole earlier this month .
 US, Yemen, The Pentagon, the Suez Canal, the Canal, US warships, the destroyer Cole, destroyer, none, the Cole
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: geographical social political, organization, person, location, facility, vehicle, weapon 
Text: {0} 
Answer:
 US, Yemen, The Pentagon, the Suez Canal, the Canal, US warships, the destroyer Cole, destroyer, none, the Cole