A change of leadership can be necessary.Logical formLearned from4 sentences. A help may be deemed necessary.Logical formLearned from4 sentences. A (kidney biopsy) can be necessary.Logical formLearned from4 sentences. Tools can be necessary for a career.Logical formLearned from4 sentences. Skills can be necessary for (college success).Logical formLearned from4 sentences. A plane can be necessary.Logical formLearned from4 sentences. Biology can be necessary.Logical formLearned from4 sentences. Skills can be necessary for decision-making.Logical formLearned from4 sentences. (Security measures) can be necessary.Logical formLearned from4 sentences. Necessary conditions can be for consolidation.Logical formLearned from4 sentences. Injury can be necessary.Logical formLearned from4 sentences. (Warning labels) can be necessary.Logical formLearned from4 sentences. A (repeat treatment) can be necessary.Logical formLearned from4 sentences. Plastic surgery can be necessary.Logical formLearned from4 sentences. A work-around can be necessary.Logical formLearned from4 sentences.