Devices may operate at (room temperature).Logical formLearned from6 sentences. Governments may operate (child support enforcement programs).Logical formLearned from6 sentences. Exchanges may operate.Logical formLearned from6 sentences. An effect may operate.Logical formLearned from6 sentences. A sensor may operate.Logical formLearned from6 sentences. A cycle may operate.Logical formLearned from6 sentences. A male may operate until a retirement.Logical formLearned from6 sentences. A person may operate in an environment.Logical formLearned from6 sentences. A scheme may operate in a country.Logical formLearned from6 sentences. Missionaries may operate.Logical formLearned from6 sentences. Some countries may operate nuclear-power plants.Logical formLearned from6 sentences. (Ferry services) may operate.Logical formLearned from6 sentences. Persons may operate in a climate.Logical formLearned from6 sentences. Aircrafts may operate at altitudes.Logical formLearned from6 sentences. A company may operate some (casino hotel properties).Logical formLearned from6 sentences.