A (ventilation system) may resume operation.Logical formLearned from14 sentences. Some industries can be in operation.Logical formLearned from14 sentences. Military operations can be against a group.Logical formLearned from14 sentences. An union may undergo an operation.Logical formLearned from14 sentences. An operation may target militants.Logical formLearned from14 sentences. An (operation chief) can be alleged.Logical formLearned from14 sentences. (Vice director) can be constituted-of-or-filled-with joint operations.Logical formLearned from14 sentences. A country may participate in military operations.Logical formLearned from14 sentences. A (command center) can be for operations.Logical formLearned from14 sentences. Branches may undergo operations.Logical formLearned from14 sentences. A world-city may start operation.Logical formLearned from14 sentences. Response can be to operations.Logical formLearned from14 sentences. An operation may be launched by (security forces).Logical formLearned from14 sentences. Operations can be cerebral.Logical formLearned from14 sentences. A terminal can be in operation.Logical formLearned from14 sentences.