Buses may be sold.Logical formLearned from12 sentences. A bus may crash into a ravine.Logical formLearned from12 sentences. A bus may crash into a river.Logical formLearned from12 sentences. A bus can be at an airport.Logical formLearned from12 sentences. A ticket can be on a bus.Logical formLearned from12 sentences. A bus may be destroyed by a bomb.Logical formLearned from12 sentences. Some (bus passengers) may die.Logical formLearned from12 sentences. A bus may plunge into a gorge.Logical formLearned from11 sentences. A (bus blaze) can be fatal.Logical formLearned from11 sentences. A (passenger bus) may skid_off a road.Logical formLearned from11 sentences. A bus may carry (army soldiers).Logical formLearned from11 sentences. Bus can be to a terminal.Logical formLearned from11 sentences. A bus may overturn on a road.Logical formLearned from11 sentences. A bus may collide head.Logical formLearned from11 sentences. A truck may hit a bus.Logical formLearned from11 sentences.