A move may prevent a flight.Logical formLearned from6 sentences. Persons may prevent a catastrophe.Logical formLearned from6 sentences. Rivalries may prevent attempts.Logical formLearned from6 sentences. Information may prevent a bombing of targets.Logical formLearned from6 sentences. A rift may prevent lawmakers from meeting.Logical formLearned from6 sentences. Measures may prevent attacks.Logical formLearned from6 sentences. Security may prevent an attacker from boarding.Logical formLearned from6 sentences. A season may prevent some whitewash.Logical formLearned from6 sentences. Israeli police may prevent extremists from stagging a rally.Logical formLearned from6 sentences. Weather may prevent a search.Logical formLearned from6 sentences. A (security concern) may prevent companies from offices.Logical formLearned from6 sentences. Agricultural protectionism may prevent nations from benefitting from free trade.Logical formLearned from6 sentences. An initiative may prevent a crisis.Logical formLearned from6 sentences. A move may be aimed at preventing a spread of terrorism.Logical formLearned from6 sentences. A row may prevent a pope.Logical formLearned from6 sentences.