A book may challenge a view.Logical formLearned from7 sentences. Acts of a legislature may be challenged.Logical formLearned from7 sentences. Unions may challenge (austerity measures) with a general strike.Logical formLearned from7 sentences. A loser may challenge results.Logical formLearned from7 sentences. A female may challenge a conventional wisdom that something-is-the-case.Logical formLearned from7 sentences. A female may challenge a ban.Logical formLearned from7 sentences. Militants may challenge a rule by strengthenning an influence.Logical formLearned from7 sentences. A world-city may challenge a ban.Logical formLearned from7 sentences. Candidates may challenge a hold on power.Logical formLearned from7 sentences. Governors may challenge a takeover.Logical formLearned from7 sentences. Judges may challenge a pact.Logical formLearned from7 sentences. A country may challenge presence.Logical formLearned from7 sentences. Parties may challenge results.Logical formLearned from7 sentences. Conservatives may challenge a decision.Logical formLearned from7 sentences. A maverick may challenge a (state political machinery).Logical formLearned from7 sentences.