An union may pertain-to (bus drivers).Logical formLearned from25 sentences. A (suicide bus bombing) may pertain-to a world-city.Logical formLearned from25 sentences. A bus may slide off a road.Logical formLearned from25 sentences. A (tourist bus) may crash.Logical formLearned from25 sentences. Persons can be in a bus.Logical formLearned from25 sentences. A (suicide bomber) may blow_apart a bus.Logical formLearned from25 sentences. A (double-decker bus) can be red.Logical formLearned from24 sentences. A bus can be in a province.Logical formLearned from24 sentences. A (tourist bus) may collide with a truck.Logical formLearned from24 sentences. Buses can be from a country.Logical formLearned from24 sentences. Buses can be southbound.Logical formLearned from24 sentences. Some buses may operate.Logical formLearned from24 sentences. Ads can be on buses.Logical formLearned from24 sentences. Buses may be operated.Logical formLearned from24 sentences. Buses can be in a US-city.Logical formLearned from24 sentences.