A plane may crash in fog.Logical formLearned from43 sentences. A helicopter may crash in an area.Logical formLearned from43 sentences. Some aircraft may crash.Logical formLearned from42 sentences. A network may crash.Logical formLearned from42 sentences. A client may crash.Logical formLearned from42 sentences. An (attack helicopter) may crash.Logical formLearned from42 sentences. A (passenger plane) may crash after take-off.Logical formLearned from42 sentences. A peso may crash.Logical formLearned from42 sentences. Some helicopters may crash in a country.Logical formLearned from42 sentences. A tu-154 may crash.Logical formLearned from42 sentences. Planes may crash into buildings.Logical formLearned from42 sentences. Jet may crash.Logical formLearned from42 sentences. A fighter may crash.Logical formLearned from41 sentences. An aircraft may crash into a sea.Logical formLearned from41 sentences. (World number one) may crash.Logical formLearned from41 sentences.