A ruling can be necessary.Logical formLearned from16 sentences. Reforms can be necessary for membership.Logical formLearned from16 sentences. An international-political-entity can be a necessary evil.Logical formLearned from16 sentences. A time-out can be necessary.Logical formLearned from16 sentences. Measures can be necessary for security.Logical formLearned from16 sentences. Some meetings can be necessary.Logical formLearned from16 sentences. Delusions can be necessary.Logical formLearned from16 sentences. Drugs can be necessary.Logical formLearned from16 sentences. A multinational force can be necessary.Logical formLearned from16 sentences. A contribution can be necessary.Logical formLearned from16 sentences. A treaty can be necessary.Logical formLearned from15 sentences. A reference can be necessary.Logical formLearned from15 sentences. Literacy can be necessary.Logical formLearned from15 sentences. Spelling can be necessary.Logical formLearned from15 sentences. Coercion can be necessary.Logical formLearned from15 sentences.