A killing may remain unsolved.Logical formLearned from61 sentences. A person may remain some games.Logical formLearned from61 sentences. Reasons may remain unknown.Logical formLearned from61 sentences. A country may remain under sanctions.Logical formLearned from61 sentences. (Gas prices) may remain high.Logical formLearned from61 sentences. A regime may remain in power.Logical formLearned from61 sentences. A country may remain among countries.Logical formLearned from61 sentences. A position may remain unclear.Logical formLearned from61 sentences. Work may remain unfinished.Logical formLearned from61 sentences. A situation may remain peaceful.Logical formLearned from61 sentences. Conditions may remain weak.Logical formLearned from61 sentences. (Peace talks) may remain frozen.Logical formLearned from61 sentences. A (security situation) may remain precarious.Logical formLearned from61 sentences. A (banking system) may remain sound.Logical formLearned from61 sentences. A cause of a fire may remain unknown.Logical formLearned from60 sentences.