An obstacle can be to reforms.Logical formLearned from21 sentences. An obstacle can be to a search.Logical formLearned from21 sentences. Some obstacles can be to success.Logical formLearned from20 sentences. Obstacles can be to a growth.Logical formLearned from20 sentences. An obstacle can be to a process.Logical formLearned from20 sentences. Obstacles can be stationary.Logical formLearned from20 sentences. An obstacle can be to a female.Logical formLearned from20 sentences. Obstacles can be to economic growth.Logical formLearned from20 sentences. Obstacles can be stiff.Logical formLearned from20 sentences. Obstacles can be to action.Logical formLearned from20 sentences. Students may face obstacles.Logical formLearned from20 sentences. An obstacle can be in a country.Logical formLearned from20 sentences. A maze can be constituted-of-or-filled-with obstacles.Logical formLearned from20 sentences. An obstacle can be hard.Logical formLearned from20 sentences. An obstacle can be between a male.Logical formLearned from20 sentences.