A going can be tough.Logical formLearned from351 sentences. A cop can be tough.Logical formLearned from350 sentences. A vote can be tough.Logical formLearned from349 sentences. A couple can be tough.Logical formLearned from348 sentences. (Market conditions) can be tough.Logical formLearned from345 sentences. A nut can be tough.Logical formLearned from345 sentences. A fighting can be tough.Logical formLearned from341 sentences. A play can be tough.Logical formLearned from336 sentences. Battles can be tough.Logical formLearned from335 sentences. Sentences can be tough.Logical formLearned from332 sentences. A .. can be tough.Logical formLearned from331 sentences. A speech can be tough.Logical formLearned from331 sentences. A matchup can be tough.Logical formLearned from330 sentences. A fighter can be tough.Logical formLearned from329 sentences. Competition can be tough.Logical formLearned from329 sentences.