A (root cause) may pertain-to a problem.Logical formLearned from722 sentences. A problem can be terrible.Logical formLearned from720 sentences. Problems can be perceived.Logical formLearned from720 sentences. Problems may arise.Logical formLearned from713 sentences. Government can be a problem.Logical formLearned from708 sentences. An approach can be to a problem.Logical formLearned from702 sentences. Problems can be theoretical.Logical formLearned from698 sentences. A history can be constituted-of-or-filled-with (heart problems).Logical formLearned from697 sentences. Problems may be addrest.Logical formLearned from695 sentences. A problem may pertain-to a country.Logical formLearned from692 sentences. Approaches can be to problems.Logical formLearned from690 sentences. A problem can be simple.Logical formLearned from689 sentences. Solutions can be for problems.Logical formLearned from688 sentences. Problems can be that something-is-the-case.Logical formLearned from684 sentences. Problems can be at_home.Logical formLearned from683 sentences.