An obstacle can be deadly.Logical formLearned from10 sentences. An obstacle can be irritating.Logical formLearned from10 sentences. Mines may present an obstacle to peace-building.Logical formLearned from10 sentences. An obstacle can be to passage.Logical formLearned from10 sentences. Obstacles can be to a return.Logical formLearned from10 sentences. Obstacles can be in a process.Logical formLearned from10 sentences. A person may avoid obstacles.Logical formLearned from10 sentences. Obstacles can be to services.Logical formLearned from10 sentences. A remover can be constituted-of-or-filled-with obstacles.Logical formLearned from10 sentences. Obstacles may be addrest.Logical formLearned from10 sentences. Obstacles can be large.Logical formLearned from10 sentences. Some obstacles may be identified.Logical formLearned from10 sentences. Students may overcome obstacles.Logical formLearned from10 sentences. Obstacles can be illegal.Logical formLearned from10 sentences. An obstacle can be to reforms.Logical formLearned from10 sentences.