Obstacles can be insurmountable.Logical formLearned from7 sentences. Obstacles may be lifted.Logical formLearned from7 sentences. A course can be with some obstacles.Logical formLearned from7 sentences. (Freezing settlements) can be an obstacle to peace.Logical formLearned from7 sentences. An obstacle can be for persons.Logical formLearned from7 sentences. A bid may face an obstacle.Logical formLearned from7 sentences. An obstacle can be to restorring security.Logical formLearned from7 sentences. Obstacles may be impeded.Logical formLearned from7 sentences. A step may remove an obstacle to a transfer.Logical formLearned from7 sentences. Obstacles can be to an achievement of a ceasefire.Logical formLearned from7 sentences. An escalation may put_up obstacles.Logical formLearned from7 sentences. Obstacles can be high.Logical formLearned from7 sentences. Obstacles may bar a (peace process).Logical formLearned from7 sentences. An uphill battle can be against obstacles.Logical formLearned from7 sentences. An obstacle can be to moving.Logical formLearned from7 sentences.