A job may challenge a person.Logical formLearned from7 sentences. Someone may challenge a female.Logical formLearned from7 sentences. A country may challenge a control.Logical formLearned from7 sentences. A reporter may challenge a credibility.Logical formLearned from7 sentences. A US-city may challenge a level of retaliation.Logical formLearned from7 sentences. A party may challenge an expulsion.Logical formLearned from7 sentences. A campaign may challenge a writ.Logical formLearned from7 sentences. Players may challenge calls.Logical formLearned from7 sentences. A claim may be challenged by delegate.Logical formLearned from7 sentences. A (security balance) may be challenged by a growth of power.Logical formLearned from7 sentences. (Opposition parties) may challenge before a supreme-court.Logical formLearned from7 sentences. A person may challenge a son.Logical formLearned from7 sentences. A US-president may challenge lawmakers.Logical formLearned from7 sentences. A report may challenge a notion.Logical formLearned from7 sentences. Online journals may challenge (peer review).Logical formLearned from7 sentences.