Spending can be on maintenance.Logical formLearned from14 sentences. Maintenance may pertain-to an airline.Logical formLearned from14 sentences. A (car maintenance) can be regular.Logical formLearned from14 sentences. Parts may undergo maintenance.Logical formLearned from14 sentences. Production can be for maintenance.Logical formLearned from14 sentences. Maintenance can be free.Logical formLearned from14 sentences. Computers may undergo maintenance.Logical formLearned from14 sentences. Heating may undergo maintenance.Logical formLearned from14 sentences. A nuclear deterrent may undergo maintenance.Logical formLearned from14 sentences. Bipolar disorder may undergo a (maintenance treatment).Logical formLearned from14 sentences. Respect can be to maintenance.Logical formLearned from14 sentences. Servers may undergo maintenance.Logical formLearned from14 sentences. (Maintenance costs) can be yearly.Logical formLearned from14 sentences. (Maintenance needs) can be monthly.Logical formLearned from14 sentences. Attention can be to maintenance.Logical formLearned from14 sentences.