A male may challenge a contention.Logical formLearned from16 sentences. A person may challenge a system.Logical formLearned from16 sentences. A female may challenge a governor.Logical formLearned from16 sentences. A male may challenge authority.Logical formLearned from16 sentences. A political-leader may be challenged by extremists.Logical formLearned from16 sentences. Persons may challenge an idea.Logical formLearned from16 sentences. A system may be challenged.Logical formLearned from16 sentences. Authority may be challenged.Logical formLearned from16 sentences. A male may challenge a man.Logical formLearned from16 sentences. Prosecutors may challenge a decision.Logical formLearned from16 sentences. A lawsuit may challenge a decision.Logical formLearned from16 sentences. A head of a denomination may challenge a party on abortion.Logical formLearned from16 sentences. A person may challenge guys.Logical formLearned from16 sentences. A person may challenge an argument.Logical formLearned from16 sentences. Lawmakers may challenge a (border agreement).Logical formLearned from16 sentences.