Cliffs can be verdant.Logical formLearned from7 sentences. (Cliff dwellings) can be prehistoric.Logical formLearned from7 sentences. A cliff can be with a parachute.Logical formLearned from7 sentences. (Cliff dwellings) can be spectacular.Logical formLearned from7 sentences. Cliffs may overlook a river.Logical formLearned from7 sentences. Cliffs may pertain-to persons.Logical formLearned from7 sentences. Residents can be on a cliff.Logical formLearned from7 sentences. Demand may fall_off a cliff.Logical formLearned from7 sentences. Cliffs may provide footing.Logical formLearned from7 sentences. A cliff may overlook a home.Logical formLearned from7 sentences. A plane may crash into a cliff.Logical formLearned from7 sentences. A person may lead persons off a cliff.Logical formLearned from7 sentences. Cliffs may pertain-to a us-state.Logical formLearned from7 sentences. Tunnels can be in cliffs.Logical formLearned from7 sentences. Some men may be charged toward a cliff.Logical formLearned from7 sentences.