(Comet fragments) may crash into a planet.Logical formLearned from6 sentences. A helicopter may crash in district.Logical formLearned from5 sentences. A uav may crash.Logical formLearned from5 sentences. A helicopter may crash in a rural area.Logical formLearned from5 sentences. A (training helicopter) may crash.Logical formLearned from5 sentences. A plane may crash into some homes.Logical formLearned from5 sentences. A helicopter may crash in a (tribal agency).Logical formLearned from5 sentences. A helicopter may crash during take-off.Logical formLearned from5 sentences. A small airplane may crash into a tributary of a river.Logical formLearned from5 sentences. A tanker may crash.Logical formLearned from5 sentences. Some helicopters may crash in a district.Logical formLearned from5 sentences. A (transport plane) may crash after takeoff.Logical formLearned from5 sentences. A minibus may crash into a back of a truck.Logical formLearned from5 sentences. Some small plane may crash.Logical formLearned from5 sentences. An ecosystem may crash.Logical formLearned from5 sentences.