A trail can be radioactive.Logical formLearned from21 sentences. Trails can be well-worn.Logical formLearned from21 sentences. A biologist can be on a trail.Logical formLearned from21 sentences. A female may hit a trail.Logical formLearned from21 sentences. A (trail ride) may pertain-to persons.Logical formLearned from21 sentences. A nebraskan may pick_up a trail.Logical formLearned from21 sentences. A foot may pertain-to a trail.Logical formLearned from21 sentences. Trails can be sustainable.Logical formLearned from21 sentences. A US-president can be off a (campaign trail).Logical formLearned from21 sentences. A trail may be completed.Logical formLearned from21 sentences. A trail can be grisly.Logical formLearned from21 sentences. A trail can be hard.Logical formLearned from21 sentences. A trail can be constituted-of-or-filled-with buildings.Logical formLearned from21 sentences. Trails can be through forests.Logical formLearned from21 sentences. A (mountain trail) may climb through (bamboo groves).Logical formLearned from21 sentences.