Obstacles may arise.Logical formLearned from11 sentences. An obstacle can be to an ambition.Logical formLearned from11 sentences. (Trade sanctions) can be an obstacle to recovery.Logical formLearned from11 sentences. An obstacle can be to a free-trade agreement.Logical formLearned from11 sentences. An (obstacle course) can be constituted-of-or-filled-with ramps.Logical formLearned from11 sentences. Obstacles may be surmounted.Logical formLearned from11 sentences. An obstacle can be in a push.Logical formLearned from11 sentences. A department may place an obstacle.Logical formLearned from11 sentences. Obstacles can be foreseeable.Logical formLearned from11 sentences. A US-president may face some obstacles.Logical formLearned from11 sentences. Obstacles can be real.Logical formLearned from11 sentences. An obstacle can be to a re-election.Logical formLearned from11 sentences. Obstacles can be longstanding.Logical formLearned from11 sentences. An obstacle can be to an emergence.Logical formLearned from11 sentences. An effort may face obstacles.Logical formLearned from11 sentences.