A person may challenge everyone.Logical formLearned from39 sentences. An ability may be challenged.Logical formLearned from39 sentences. Leadership may be challenged.Logical formLearned from39 sentences. An action may be challenged.Logical formLearned from39 sentences. A male may challenge for a ball.Logical formLearned from38 sentences. Volunteers may challenge an eligibility of a voter.Logical formLearned from37 sentences. A law may be challenged in court.Logical formLearned from37 sentences. A US-president may challenge a male.Logical formLearned from37 sentences. A belief may be challenged.Logical formLearned from36 sentences. Persons may challenge someone.Logical formLearned from36 sentences. A person may challenge a law.Logical formLearned from36 sentences. Books may be challenged.Logical formLearned from35 sentences. A male may challenge a male to a fight.Logical formLearned from35 sentences. A person may challenge a notion.Logical formLearned from35 sentences. A person may challenge authority.Logical formLearned from35 sentences.