(Police officers) can be on motorcycles.Logical formLearned from18 sentences. A (motorcycle accident) can be in a US-city.Logical formLearned from18 sentences. A motorcycle may blow_up.Logical formLearned from18 sentences. An officer can be on a motorcycle.Logical formLearned from18 sentences. A headquarters may pertain-to a (motorcycle gang).Logical formLearned from18 sentences. (Motorcycle gangs) can be violent.Logical formLearned from18 sentences. A bomb may be placed on a motorcycle.Logical formLearned from18 sentences. A gunman may ride pillion on a motorcycle.Logical formLearned from18 sentences. Some persons can be on some motorcycles.Logical formLearned from18 sentences. A motorcycle can be czech.Logical formLearned from17 sentences. (Motorcycle helmets) may undergo a use.Logical formLearned from17 sentences. A motorcycle can be personal.Logical formLearned from17 sentences. (Motorcycle crashes) can be fatal.Logical formLearned from17 sentences. A man may ride a motorcycle.Logical formLearned from17 sentences. A person may take a (motorcycle trip).Logical formLearned from17 sentences.