Some obstacles can be to voting.Logical formLearned from6 sentences. A bulk can be an obstacle to using (fuel cells).Logical formLearned from6 sentences. An obstacle may stand in a path.Logical formLearned from6 sentences. An obstacle can be to using (fuel cells).Logical formLearned from6 sentences. A person may find an obstacle.Logical formLearned from6 sentences. Some obstacle may be throw_uped.Logical formLearned from6 sentences. An obstacle may ukra itself.Logical formLearned from6 sentences. Persons may be used to overcomming some kinds of obstacles.Logical formLearned from6 sentences. An obstacle can be to a dialogue.Logical formLearned from6 sentences. An obstacle can be politics.Logical formLearned from6 sentences. An obstacle can be on (campaign finance reform).Logical formLearned from6 sentences. A frought can be with obstacles.Logical formLearned from6 sentences. An obstacle can be a tone of tactics.Logical formLearned from6 sentences. An obstacle can be to a future.Logical formLearned from6 sentences. White racism can be an obstacle to advance.Logical formLearned from6 sentences.