A trail may begin.Logical formLearned from18 sentences. A trail may pertain-to a creature.Logical formLearned from18 sentences. Trails can be well-groomed.Logical formLearned from18 sentences. A trail may open.Logical formLearned from18 sentences. Trails can be in woods.Logical formLearned from18 sentences. A trail may be extended.Logical formLearned from18 sentences. A trail may take a person.Logical formLearned from18 sentences. A trail can be lighted.Logical formLearned from18 sentences. Hiking can be on trails.Logical formLearned from18 sentences. A trail can be invisible.Logical formLearned from18 sentences. A trail can be constituted-of-or-filled-with black smoke.Logical formLearned from18 sentences. A surrogate can be on a (campaign trail).Logical formLearned from18 sentences. A trail can be shaded.Logical formLearned from18 sentences. Some trails can be constituted-of-or-filled-with some lifts.Logical formLearned from18 sentences. A male may leave a trail of destruction.Logical formLearned from18 sentences.