Trails can be hard.Logical formLearned from8 sentences. A trail can be constituted-of-or-filled-with errors.Logical formLearned from8 sentences. (Ski trails) can be in-bounds.Logical formLearned from8 sentences. A route can be constituted-of-or-filled-with (ski trails).Logical formLearned from8 sentences. A network can be constituted-of-or-filled-with (ski trails).Logical formLearned from8 sentences. A trail can be fabled.Logical formLearned from8 sentences. A male may repeat on a (campaign trail).Logical formLearned from8 sentences. A trail may be left.Logical formLearned from8 sentences. A trail can be frozen.Logical formLearned from8 sentences. Trails can be marked.Logical formLearned from8 sentences. Trails can be lowland.Logical formLearned from8 sentences. Machines can be with (paper trails).Logical formLearned from8 sentences. A (hike-and-bike trail) may pertain-to a lake.Logical formLearned from8 sentences. (Hiking trails) can be wooded.Logical formLearned from8 sentences. A (campaign trail) can be with an elected-representative.Logical formLearned from8 sentences.