A back may pertain-to a train.Logical formLearned from371 sentences. (Train bombings) may kill some persons.Logical formLearned from364 sentences. A person may take a train.Logical formLearned from363 sentences. A (train station) may pertain-to a city.Logical formLearned from352 sentences. Trains may pertain-to a person.Logical formLearned from348 sentences. Trains may pertain-to a world-city.Logical formLearned from348 sentences. Trains may stop.Logical formLearned from341 sentences. A person may lose a train of thought.Logical formLearned from340 sentences. A train can be northbound.Logical formLearned from336 sentences. A train can be empty.Logical formLearned from325 sentences. Persons may get on a train.Logical formLearned from325 sentences. Trains can be regular.Logical formLearned from323 sentences. Trains may pertain-to persons.Logical formLearned from312 sentences. Trains can be southbound.Logical formLearned from311 sentences. (Subway trains) may pertain-to a world-city.Logical formLearned from307 sentences.