Cliffs may erode.Logical formLearned from4 sentences. A summit may pertain-to cliffs.Logical formLearned from4 sentences. A niche can be in a cliff.Logical formLearned from4 sentences. Cliffs can be martian.Logical formLearned from4 sentences. Chances may slide over cliffs.Logical formLearned from4 sentences. Holes can be in a cliff.Logical formLearned from4 sentences. A cliff can be broken.Logical formLearned from4 sentences. A soul can be pure as a cliff of crystal.Logical formLearned from4 sentences. A city can be on a cliff.Logical formLearned from4 sentences. Cliffs can be raw.Logical formLearned from4 sentences. Some travelers may climb to a summit of a cliff.Logical formLearned from4 sentences. (Granite cliffs) can be rugged.Logical formLearned from4 sentences. A (cliff erosion) can be coastal.Logical formLearned from4 sentences. Cliffs can be sites.Logical formLearned from4 sentences. A cliff may be formed.Logical formLearned from4 sentences.