A person may overcome obstacles.Logical formLearned from26 sentences. A person may face an obstacle.Logical formLearned from26 sentences. An obstacle can be challenging.Logical formLearned from26 sentences. An obstacle can be overwhelming.Logical formLearned from26 sentences. Obstacles may loom.Logical formLearned from26 sentences. An obstacle can be underwater.Logical formLearned from26 sentences. Obstacles can be serious.Logical formLearned from26 sentences. An obstacle can be to work.Logical formLearned from26 sentences. Solutions can be to obstacles.Logical formLearned from26 sentences. An obstacle can be immovable.Logical formLearned from26 sentences. A political-leader can be an obstacle.Logical formLearned from26 sentences. Obstacles can be to talks.Logical formLearned from26 sentences. An obstacle can be to a fight.Logical formLearned from26 sentences. An obstacle can be to an accord.Logical formLearned from26 sentences. Obstacles can be vertical.Logical formLearned from25 sentences.