A militant group may operate in a country.Logical formLearned from13 sentences. Some refineries may operate.Logical formLearned from13 sentences. A (guerrilla group) may operate in a country.Logical formLearned from13 sentences. Producer may operate in a production of oil.Logical formLearned from13 sentences. A military-or-other-action-organization may operate some aircraft.Logical formLearned from13 sentences. Israeli troops may operate in an area.Logical formLearned from13 sentences. Groups may operate in areas.Logical formLearned from13 sentences. Groups may operate above a law.Logical formLearned from13 sentences. Personnel may operate.Logical formLearned from13 sentences. Ports may operate.Logical formLearned from13 sentences. (Coal mines) may operate.Logical formLearned from13 sentences. Helicopters may operate.Logical formLearned from13 sentences. Some companies may operate factories.Logical formLearned from13 sentences. Some companies may operate in a market.Logical formLearned from12 sentences. A company may operate a dam.Logical formLearned from12 sentences.