A (nerve center) may pertain-to an operation.Logical formLearned from18 sentences. Some insurgents may be killed in an operation.Logical formLearned from18 sentences. An operation may take some weeks.Logical formLearned from18 sentences. A military operation may succeed.Logical formLearned from18 sentences. Billions can be constituted-of-or-filled-with operations.Logical formLearned from18 sentences. An operation can be closed.Logical formLearned from18 sentences. An operation can be daily.Logical formLearned from18 sentences. An operation may be based in a US-city.Logical formLearned from18 sentences. (Government operations) can be basic.Logical formLearned from18 sentences. A review can be constituted-of-or-filled-with (military operations).Logical formLearned from18 sentences. Track may pertain-to operations.Logical formLearned from18 sentences. An economic system may undergo an operation.Logical formLearned from18 sentences. An emblem can be for an operation.Logical formLearned from18 sentences. (Defense operations) may pertain-to a company.Logical formLearned from18 sentences. (Satellite operations) may pertain-to a company.Logical formLearned from18 sentences.