Cliffs can be pale.Logical formLearned from5 sentences. Cliffs may rise some feet.Logical formLearned from5 sentences. Long lines can be constituted-of-or-filled-with cliffs.Logical formLearned from5 sentences. Cliffs can be stratified.Logical formLearned from5 sentences. A cliff can be volcanic.Logical formLearned from5 sentences. A cliff can be shaded.Logical formLearned from5 sentences. Lemmings may go over a cliff.Logical formLearned from5 sentences. A cliff can be above persons.Logical formLearned from5 sentences. A cliff can be eroded.Logical formLearned from5 sentences. A head may pertain-to a cliff.Logical formLearned from5 sentences. The irish economy may fall off a cliff.Logical formLearned from5 sentences. (Oil prices) may fall off a cliff.Logical formLearned from5 sentences. A valley may be surrounded by cliffs.Logical formLearned from5 sentences. Cliffs can be with dozens of caves.Logical formLearned from5 sentences. Cliffs may be pocked with (gun emplacements).Logical formLearned from5 sentences.