A trail may climb some feet.Logical formLearned from11 sentences. Some parts of a trail may follow (forest roads).Logical formLearned from11 sentences. Portions may pertain-to trails.Logical formLearned from11 sentences. Trails can be in a wilderness.Logical formLearned from11 sentences. Trails can be in a US-city.Logical formLearned from11 sentences. A trail may be connected.Logical formLearned from11 sentences. A trail can be a mile.Logical formLearned from11 sentences. Trails can be on a mountain.Logical formLearned from11 sentences. A point may pertain-to a trail.Logical formLearned from11 sentences. A trail may be considered.Logical formLearned from11 sentences. A trail can be well-defined.Logical formLearned from11 sentences. A trail can be in a forest.Logical formLearned from11 sentences. A trail can be constituted-of-or-filled-with trash.Logical formLearned from11 sentences. A trail can be informal.Logical formLearned from11 sentences. A park may have of trails.Logical formLearned from11 sentences.