(Aircraft engines) can be regular.Logical formLearned from95 sentences. Some aircraft may return to bases.Logical formLearned from95 sentences. Damage can be to an aircraft.Logical formLearned from95 sentences. Problems can be with an aircraft.Logical formLearned from95 sentences. An aircraft may begin.Logical formLearned from95 sentences. An aircraft can be in the world.Logical formLearned from94 sentences. An aircraft may make an (emergency landing).Logical formLearned from94 sentences. Pieces may pertain-to an aircraft.Logical formLearned from94 sentences. An aircraft may pertain-to an airline.Logical formLearned from91 sentences. An order can be for some aircrafts.Logical formLearned from91 sentences. Aircraft may undergo a collection.Logical formLearned from91 sentences. A (nuclear-powered aircraft carrier) may pertain-to a country.Logical formLearned from91 sentences. A fuselage may pertain-to an aircraft.Logical formLearned from90 sentences. An aircraft may be flown.Logical formLearned from90 sentences. An aircraft may undergo an inspection.Logical formLearned from90 sentences.