(Mountain ridges) can be in a sector of a border.Logical formLearned from4 sentences. A ridge can be rugged.Logical formLearned from4 sentences. Ridges can be in question.Logical formLearned from4 sentences. Ridges can be on an index.Logical formLearned from4 sentences. Some (guerrilla bunkers) may dig into ridges.Logical formLearned from4 sentences. Positions can be on a (mountain ridge).Logical formLearned from4 sentences. Ridges can be uninhabited.Logical formLearned from4 sentences. A ridge may pertain-to a dam.Logical formLearned from4 sentences. A ridge can be in_front_of a pin.Logical formLearned from4 sentences. A shot may roll_up a ridge.Logical formLearned from4 sentences. A ridge can be in a (mountain range).Logical formLearned from4 sentences. A person may climb a ridge.Logical formLearned from4 sentences. An aircraft may approach a (mountain ridge).Logical formLearned from4 sentences. A (mountain ridge) can be over a river.Logical formLearned from4 sentences. A ridge may face a storm.Logical formLearned from4 sentences.