A (police helicopter) may crash.Logical formLearned from40 sentences. A jetliner may crash after takeoff.Logical formLearned from40 sentences. A c-130 may crash.Logical formLearned from40 sentences. Someone may crash.Logical formLearned from39 sentences. A currency may crash.Logical formLearned from39 sentences. Hijackers may crash a plane.Logical formLearned from39 sentences. A (fighter jet) may crash.Logical formLearned from38 sentences. A plane may crash into a building.Logical formLearned from38 sentences. A wave may crash.Logical formLearned from38 sentences. A small plane may crash in a field.Logical formLearned from38 sentences. Airplanes may crash.Logical formLearned from38 sentences. A bike may crash.Logical formLearned from38 sentences. A plane may crash on approach.Logical formLearned from38 sentences. A person may crash a plane.Logical formLearned from38 sentences. Persons may crash a party.Logical formLearned from37 sentences.