A mystery may remain unsolved.Logical formLearned from47 sentences. A person may remain confused.Logical formLearned from47 sentences. Views may remain unchanged.Logical formLearned from47 sentences. Prices may remain weak.Logical formLearned from47 sentences. A US-president may remain a front-runner.Logical formLearned from47 sentences. A file may remain open.Logical formLearned from47 sentences. Persons may remain poor.Logical formLearned from47 sentences. Sides may remain at odds.Logical formLearned from47 sentences. A man may remain in custody.Logical formLearned from47 sentences. An international airport may remain closed.Logical formLearned from47 sentences. A market may remain vulnerable.Logical formLearned from47 sentences. (Market sentiment) may remain positive.Logical formLearned from47 sentences. Some problems may remain unresolved.Logical formLearned from47 sentences. Craft may remain in port.Logical formLearned from47 sentences. A country may remain within a country.Logical formLearned from47 sentences.