Cliffs may obscure the sky.Logical formLearned from5 sentences. Cliffs may overlook an ocean.Logical formLearned from5 sentences. Financial markets may fall_off a cliff.Logical formLearned from5 sentences. Minerals may drape (cliff walls).Logical formLearned from5 sentences. A man may stand on a cliff.Logical formLearned from5 sentences. (Basalt cliffs) can be steep.Logical formLearned from5 sentences. A cliff may be knowned.Logical formLearned from5 sentences. A two-lane road can be at a foot of cliffs.Logical formLearned from5 sentences. Minerals may cover cliffs.Logical formLearned from5 sentences. (Cliff dwellings) can be elaborate.Logical formLearned from5 sentences. A mountain can be a cliff.Logical formLearned from5 sentences. A cliff can be in hills.Logical formLearned from5 sentences. Persons can be over a cliff.Logical formLearned from5 sentences. Persons may approach a cliff.Logical formLearned from5 sentences. Cliffs may be created by a collapse.Logical formLearned from5 sentences.