An obstacle can be to peace-building.Logical formLearned from11 sentences. Obstacles can be at a turn.Logical formLearned from11 sentences. Obstacles may undergo an avoidance.Logical formLearned from11 sentences. An obstacle can be unacceptable.Logical formLearned from11 sentences. Obstacles may undergo a detection.Logical formLearned from11 sentences. Obstacles can be lethal.Logical formLearned from11 sentences. An obstacle can be to an advance.Logical formLearned from11 sentences. A company may face obstacles.Logical formLearned from11 sentences. An obstacle can be to democratization.Logical formLearned from11 sentences. An obstacle can be to achieving a vision of some states.Logical formLearned from11 sentences. An obstacle can be to a passage.Logical formLearned from11 sentences. An obstacle can be to a happiness.Logical formLearned from11 sentences. A person may overcame an obstacle.Logical formLearned from11 sentences. Obstacles can be costly.Logical formLearned from11 sentences. Obstacles can be to migration.Logical formLearned from11 sentences.