A park may have trails.Logical formLearned from19 sentences. Some trails can be open to hiking.Logical formLearned from19 sentences. A trail can be through a forest.Logical formLearned from19 sentences. A (hiking trail) can be in a park.Logical formLearned from19 sentences. (Hiking trails) can be in a park.Logical formLearned from19 sentences. Travelers can be on a trail.Logical formLearned from19 sentences. A trail may pertain-to a killer.Logical formLearned from19 sentences. A trail can be simple.Logical formLearned from19 sentences. A government-agency can be on a trail.Logical formLearned from19 sentences. A trail can be known.Logical formLearned from19 sentences. Trails can be crowded.Logical formLearned from19 sentences. A width may pertain-to a trail.Logical formLearned from19 sentences. Trails may be built.Logical formLearned from19 sentences. Trails may be developed.Logical formLearned from19 sentences. (Snowmobile trails) can be groomed.Logical formLearned from19 sentences.