(Spy planes) may pertain-to a country.Logical formLearned from360 sentences. A (plane crash) may pertain-to a weekday.Logical formLearned from360 sentences. Planes may undergo a delivery.Logical formLearned from359 sentences. A tail may pertain-to a plane.Logical formLearned from359 sentences. Planes may pertain-to a female.Logical formLearned from358 sentences. A (plane crash) can be fiery.Logical formLearned from357 sentences. A (plane crash) can be mysterious.Logical formLearned from354 sentences. A (plane crash) can be fatal.Logical formLearned from353 sentences. (Fighter planes) may pertain-to a country.Logical formLearned from351 sentences. A part may pertain-to a plane.Logical formLearned from351 sentences. A plane may be hited.Logical formLearned from350 sentences. A plane may carry some passengers.Logical formLearned from345 sentences. A (passenger plane) may crash.Logical formLearned from345 sentences. A plane can be on a flight.Logical formLearned from344 sentences. Persons may board a plane.Logical formLearned from336 sentences.