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(subclass Helicopter Aircraft) Mid-level-ontology.kif 17853-17853 Helicopter is a subclass of aircraft
(subclass CH53E Helicopter) MilitaryDevices.kif 1767-1767 C h53 e is a subclass of helicopter
(subclass CH46D Helicopter) MilitaryDevices.kif 1828-1828 C h46 d is a subclass of helicopter
(subclass AH1 Helicopter) MilitaryDevices.kif 1889-1889 A h1 is a subclass of helicopter


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