A US-president may challenge a president.Logical formLearned from20 sentences. (Noise levels) may challenge a predecessor.Logical formLearned from20 sentences. A team may be challenged.Logical formLearned from20 sentences. A person may challenge a team.Logical formLearned from20 sentences. A person may challenge a policy.Logical formLearned from20 sentences. Principles may be challenged.Logical formLearned from20 sentences. A male may challenge that something-is-the-case.Logical formLearned from20 sentences. A male may challenge a record.Logical formLearned from20 sentences. Some ballots may be challenged.Logical formLearned from20 sentences. A male may challenge a government.Logical formLearned from20 sentences. Skills may be challenged.Logical formLearned from19 sentences. A role may be challenged.Logical formLearned from19 sentences. Ideas may be challenged.Logical formLearned from19 sentences. A male may be challenged to a (sword fight).Logical formLearned from19 sentences. Validity may be challenged.Logical formLearned from19 sentences.