Obstacles can be staggering.Logical formLearned from12 sentences. A cost can be an obstacle.Logical formLearned from12 sentences. A regulation may create obstacles.Logical formLearned from12 sentences. An obstacle can be in a form of a psycho-in-the-making.Logical formLearned from12 sentences. Hopes may hit an obstacle.Logical formLearned from12 sentences. A political-leader can be an obstacle to a process of reconciliation.Logical formLearned from12 sentences. Obstacles may be faced by persons.Logical formLearned from12 sentences. Obstacles can be hazardous.Logical formLearned from12 sentences. Obstacles can be to (sediment remediation).Logical formLearned from12 sentences. Obstacles can be to management.Logical formLearned from12 sentences. An obstacle can be to acceptance.Logical formLearned from12 sentences. An obstacle can be to improvement.Logical formLearned from12 sentences. Obstacles can be to work.Logical formLearned from12 sentences. Obstacles can be conceptual.Logical formLearned from12 sentences. An obstacle can be to trade.Logical formLearned from12 sentences.