Persons may be prevented.Logical formLearned from9 sentences. Agreements may prevent persons from nuclear tests.Logical formLearned from9 sentences. A fix may prevent users from circumventing a feature.Logical formLearned from9 sentences. A drug may prevent (bone loss).Logical formLearned from9 sentences. A lining may prevent a metal of a pipe from comming into contact.Logical formLearned from9 sentences. A clause may prevent a male from joining a board.Logical formLearned from9 sentences. A person may be prevented by illness.Logical formLearned from9 sentences. A government may prevent attacks.Logical formLearned from9 sentences. A female may be prevented from leaving a country.Logical formLearned from9 sentences. A person may prevent terrorism.Logical formLearned from9 sentences. Thousands of voters may be prevented from exercissing a franchise.Logical formLearned from9 sentences. Delays may prevent a legislature from finishing a bill.Logical formLearned from9 sentences. A war may prevent poverty.Logical formLearned from9 sentences. Revelations may prevent fraud.Logical formLearned from9 sentences. Death may prevent a male.Logical formLearned from9 sentences.