Some (maintenance complaints) may be submitted by pilots.Logical formLearned from17 sentences. Clergies may undergo maintenance.Logical formLearned from17 sentences. Plants may require maintenance.Logical formLearned from17 sentences. Slavery may undergo maintenance.Logical formLearned from17 sentences. A (maintenance work) can be preventive.Logical formLearned from17 sentences. A plan may undergo maintenance.Logical formLearned from17 sentences. Public safety may undergo maintenance.Logical formLearned from17 sentences. Maintenance can be dynamic.Logical formLearned from17 sentences. A matter can be constituted-of-or-filled-with maintenance.Logical formLearned from17 sentences. (Maintenance activities) can be planned.Logical formLearned from17 sentences. A male can be (maintenance worker).Logical formLearned from17 sentences. Traditions may undergo maintenance.Logical formLearned from17 sentences. A system can be constituted-of-or-filled-with maintenance.Logical formLearned from17 sentences. Communication may undergo maintenance.Logical formLearned from17 sentences. Maintenance can be institutional.Logical formLearned from17 sentences.