Cliffs can be unscalable.Logical formLearned from3 sentences. A male may watch (cliff tops).Logical formLearned from3 sentences. A part may be surrounded by cliffs.Logical formLearned from3 sentences. Some sides may be surrounded by cliffs.Logical formLearned from3 sentences. A line of cliff may diverge on a side.Logical formLearned from3 sentences. Earth may fall_down from a cliff.Logical formLearned from3 sentences. Masses of ice may fall from cliffs.Logical formLearned from3 sentences. A cliff can be constituted-of-or-filled-with ice.Logical formLearned from3 sentences. A line of cliff may be frequented by birds.Logical formLearned from3 sentences. Cliffs may extend in a long line.Logical formLearned from3 sentences. A cliff may form a boundary of a valley.Logical formLearned from3 sentences. Cliffs may fall into a sea.Logical formLearned from3 sentences. Apes may fall from an edge of a cliff.Logical formLearned from3 sentences. A clearing may lead to an edge of a cliff.Logical formLearned from3 sentences. The ground can be at a foot of a cliff.Logical formLearned from3 sentences.