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The aircraft ' s censors detected the unknown type of laser while it was flying near the heavily fortified frontier that divides the two Koreas , the U . S . military official said on condition of anonymity .
 the two Koreas, U . S, U . S . military, the U . S . military official, The aircraft, it, the heavily fortified frontier that divides the two Koreas, that, the unknown type of laser, laser
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:
 the two Koreas, U . S, U . S . military, the U . S . military official, The aircraft, it, the heavily fortified frontier that divides the two Koreas, that, the unknown type of laser, laser