Some hijackers may crash some jetliners.Logical formLearned from21 sentences. A world-city may crash in a country.Logical formLearned from21 sentences. A plane may crash in the countryside.Logical formLearned from21 sentences. A tu-154 may crash in a country.Logical formLearned from21 sentences. Some drivers may crash.Logical formLearned from21 sentences. A plane may crash at an airport.Logical formLearned from21 sentences. A plane may crash on take-off.Logical formLearned from21 sentences. A plane may crash into a river.Logical formLearned from21 sentences. An a300 may crash into a hillside.Logical formLearned from21 sentences. An aircraft may crash into a mountain.Logical formLearned from21 sentences. A club may crash.Logical formLearned from21 sentences. A (tour bus) may crash.Logical formLearned from21 sentences. A bus may crash into a truck.Logical formLearned from21 sentences. A (cargo plane) may crash in a country.Logical formLearned from21 sentences. A jet may crash after takeoff.Logical formLearned from21 sentences.