A male may challenge an attempt.Logical formLearned from16 sentences. A lead may be challenged.Logical formLearned from16 sentences. A male may challenge rules.Logical formLearned from16 sentences. A study may challenge a notion.Logical formLearned from15 sentences. A state may challenge findings.Logical formLearned from15 sentences. A male may challenge critics.Logical formLearned from15 sentences. Ideas may challenge a (status quo).Logical formLearned from15 sentences. A body may be challenged by enemies.Logical formLearned from15 sentences. Persons may challenge for a title.Logical formLearned from15 sentences. A political-leader may challenge a status.Logical formLearned from15 sentences. A male may challenge a consensus.Logical formLearned from15 sentences. An opinion may be challenged.Logical formLearned from15 sentences. A person may challenge a position.Logical formLearned from15 sentences. A male may challenge a US-president to a debate.Logical formLearned from15 sentences. An order may be challenged.Logical formLearned from15 sentences.