A problem may be encountered.Logical formLearned from150 sentences. A view may show a problem.Logical formLearned from150 sentences. Problems may be overcome.Logical formLearned from150 sentences. Problems can be continuous.Logical formLearned from150 sentences. (Energy problems) may pertain-to the world.Logical formLearned from150 sentences. A problem can be with a knee.Logical formLearned from150 sentences. A problem can be with persons.Logical formLearned from150 sentences. Approaches can be to problems.Logical formLearned from149 sentences. Problems may mount.Logical formLearned from149 sentences. Piracy can be a problem.Logical formLearned from149 sentences. A problem may remain unresolved.Logical formLearned from149 sentences. A (drug problem) may pertain-to a male.Logical formLearned from149 sentences. Problems can be in an industry.Logical formLearned from148 sentences. Problems can be intractable.Logical formLearned from148 sentences. A problem can be disciplinary.Logical formLearned from148 sentences.