Means can be necessary.Logical formLearned from3 019 sentences. An experience can be necessary.Logical formLearned from1 706 sentences. Action can be necessary.Logical formLearned from1 325 sentences. An information can be necessary.Logical formLearned from1 175 sentences. Research can be necessary.Logical formLearned from1 100 sentences. Changes can be necessary.Logical formLearned from998 sentences. Information can be necessary.Logical formLearned from889 sentences. Measures can be necessary.Logical formLearned from802 sentences. A change can be necessary.Logical formLearned from750 sentences. Surgery can be necessary.Logical formLearned from726 sentences. An action can be necessary.Logical formLearned from664 sentences. Work can be necessary.Logical formLearned from637 sentences. Change can be necessary.Logical formLearned from625 sentences. Changes can be necessary.Logical formLearned from619 sentences. Treatment can be necessary.Logical formLearned from568 sentences.