Persons may prevent types of panics.Logical formLearned from6 sentences. (Security considerations) may prevent an attendence.Logical formLearned from6 sentences. A group of some police may prevent students from occupying a bridge.Logical formLearned from6 sentences. Pressure may prevent a confrontation.Logical formLearned from6 sentences. Difficulties may prevent an agreement.Logical formLearned from6 sentences. A government may prevent a (boat exodus).Logical formLearned from6 sentences. The world may prevent infections.Logical formLearned from5 sentences. (Agriculture products) may prevent a country from slipping into a predicament of inflation.Logical formLearned from5 sentences. An (opposition boycott) may prevent an election.Logical formLearned from5 sentences. Difficulties may prevent a country from moving on a pact.Logical formLearned from5 sentences. A person may prevent progress.Logical formLearned from5 sentences. A (security service) may prevent attacks.Logical formLearned from5 sentences. Problems may prevent persons.Logical formLearned from5 sentences. Developing countries can be for preventing (climate change).Logical formLearned from5 sentences. Residents may be prevented from leaving towns.Logical formLearned from5 sentences.