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reporter : keller takes us onboard an iraqi vessel , one of the most common threats lurking around the sea bed .
 iraqi, keller, us, an iraqi vessel, one of the most common threats lurking around the sea bed
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, keller, us, an iraqi vessel, one of the most common threats lurking around the sea bed