Maintenance may pertain-to persons.Logical formLearned from194 sentences. A need can be for maintenance.Logical formLearned from183 sentences. (Maintenance costs) can be annual.Logical formLearned from183 sentences. Maintenance can be needed.Logical formLearned from181 sentences. Systems may undergo maintenance.Logical formLearned from176 sentences. An environment may undergo maintenance.Logical formLearned from175 sentences. A (maintenance fee) can be annual.Logical formLearned from174 sentences. Maintenance can be on-site.Logical formLearned from172 sentences. A building may undergo maintenance.Logical formLearned from165 sentences. Buildings may undergo maintenance.Logical formLearned from162 sentences. Information may undergo maintenance.Logical formLearned from160 sentences. Maintenance may be required.Logical formLearned from159 sentences. Maintenance can be unscheduled.Logical formLearned from153 sentences. A (maintenance fee) can be monthly.Logical formLearned from152 sentences. Facilities may undergo maintenance.Logical formLearned from151 sentences.