Terrain can be with cliffs.Logical formLearned from4 sentences. A (commuter train) may slam into a cliff.Logical formLearned from4 sentences. Persons can be an edge of a cliff.Logical formLearned from4 sentences. Construction may over-reach an edge of a cliff.Logical formLearned from4 sentences. A cliff can be barren.Logical formLearned from3 sentences. A boat may strike cliffs.Logical formLearned from3 sentences. A vehicle may fall_off a cliff.Logical formLearned from3 sentences. A buss may fall_off a cliff.Logical formLearned from3 sentences. A cliff may collapse on some houses.Logical formLearned from3 sentences. A vehicle may go over a cliff.Logical formLearned from3 sentences. A vehicle may slide off a cliff.Logical formLearned from3 sentences. A bus may fall off a cliff.Logical formLearned from3 sentences. A (crash site) may be located at an edge of a cliff.Logical formLearned from3 sentences. A person may build (cliff dwellings).Logical formLearned from3 sentences. A sea can be between cliffs.Logical formLearned from3 sentences.