A cliff can be known.Logical formLearned from4 sentences. An angle may pertain-to a cliff.Logical formLearned from4 sentences. Team-dogs may be sweep_backed against a cliff.Logical formLearned from4 sentences. A cliff can be a limit.Logical formLearned from4 sentences. Persons may be surrounded by cliffs.Logical formLearned from4 sentences. A degradation of a cliff can be rapid.Logical formLearned from4 sentences. A trail may be open_uped around a face of a cliff.Logical formLearned from4 sentences. A cliff may pertain-to a writer.Logical formLearned from4 sentences. Officials may call a (funding cliff).Logical formLearned from4 sentences. Persons may fall_off a cliff.Logical formLearned from4 sentences. A person may walk_off a cliff.Logical formLearned from4 sentences. (Ad revenues) may fall off a cliff.Logical formLearned from4 sentences. Cliffs can be above a river.Logical formLearned from4 sentences. A US-president may spend a weekend on a cliff.Logical formLearned from4 sentences. A cliff can be fragile.Logical formLearned from4 sentences.