Some brackets can be for presidents.Logical formLearned from78 sentences. A worst president can be in American history.Logical formLearned from78 sentences. President can be effective.Logical formLearned from78 sentences. A (vice president) may pertain-to an organization.Logical formLearned from78 sentences. A (president pro tem) may pertain-to a legislature.Logical formLearned from78 sentences. A battle can be with a president.Logical formLearned from78 sentences. Some bid can be for president.Logical formLearned from78 sentences. A US-president may become a black president.Logical formLearned from78 sentences. Biographies can be constituted-of-or-filled-with presidents.Logical formLearned from78 sentences. A president may be inaugurated.Logical formLearned from78 sentences. A person can be a president of a company.Logical formLearned from78 sentences. (Vice president) can be for (investor relations).Logical formLearned from78 sentences. A position can be as (vice president).Logical formLearned from78 sentences. A personality may pertain-to a president.Logical formLearned from78 sentences. An aide can be to a president.Logical formLearned from78 sentences.