An obstacle can be in an effort.Logical formLearned from8 sentences. An obstacle may be overcome.Logical formLearned from8 sentences. Obstacles can be to improvement.Logical formLearned from8 sentences. An obstacle can be for a development.Logical formLearned from8 sentences. Obstacles can be philosophical.Logical formLearned from8 sentences. A capsule may pass without obstacles.Logical formLearned from8 sentences. An obstacle can be for negotiators.Logical formLearned from8 sentences. A male may remove obstacles.Logical formLearned from8 sentences. Obstacles can be to a rebound.Logical formLearned from8 sentences. An obstacle can be to a government.Logical formLearned from8 sentences. An obstacle can be to a relationship.Logical formLearned from8 sentences. A plan may encounter obstacles.Logical formLearned from8 sentences. Construction can be an obstacle to peace.Logical formLearned from8 sentences. Construction can be an obstacle to (peace talks).Logical formLearned from8 sentences. An obstacle can be to normalization.Logical formLearned from8 sentences.