Lights may be operated to a color.Logical formLearned from37 sentences. (Death squads) may operate in a country.Logical formLearned from37 sentences. Offices may operate.Logical formLearned from37 sentences. Facilities may operate.Logical formLearned from37 sentences. Contractors may operate.Logical formLearned from37 sentences. Carriers may operate.Logical formLearned from37 sentences. Businessmen may operate.Logical formLearned from37 sentences. A bloc may operate.Logical formLearned from37 sentences. (Fishing boats) may operate.Logical formLearned from37 sentences. An industry may operate.Logical formLearned from37 sentences. Some airports may operate.Logical formLearned from37 sentences. Forces may operate in an area.Logical formLearned from37 sentences. A company may operate a plant.Logical formLearned from37 sentences. A carrier may operate some flights.Logical formLearned from36 sentences. Some services may operate.Logical formLearned from36 sentences.