Correspondents may operate under cover.Logical formLearned from15 sentences. Some organizations may operate in a country.Logical formLearned from15 sentences. Commercial banks may operate in a country.Logical formLearned from14 sentences. A person may operate in a region.Logical formLearned from14 sentences. Companies may operate in a region.Logical formLearned from14 sentences. Some nuclear-power plants may operate in a country.Logical formLearned from14 sentences. An airline may operate flights.Logical formLearned from14 sentences. Forces may operate in an area.Logical formLearned from14 sentences. Some nuclear-power plants may operate.Logical formLearned from14 sentences. (Passenger services) may operate on a line.Logical formLearned from14 sentences. Windows may operate.Logical formLearned from14 sentences. An (express train service) may be operated by a company.Logical formLearned from14 sentences. International organizations may operate in a country.Logical formLearned from14 sentences. (Military forces) may operate in a country.Logical formLearned from14 sentences. A company may operate some restaurants.Logical formLearned from14 sentences.