Sets can be closed.Logical formLearned from3 sentences. A (proprietary network) can be closed.Logical formLearned from3 sentences. A (manufacturing facility) can be closed.Logical formLearned from3 sentences. A tomb can be closed.Logical formLearned from3 sentences. A closed loop can be constituted-of-or-filled-with electrons.Logical formLearned from3 sentences. A (solenoid valve) can be closed.Logical formLearned from3 sentences. (Chain exercises) can be closed.Logical formLearned from3 sentences. A (memorial service) can be closed.Logical formLearned from3 sentences. A nexus can be closed.Logical formLearned from3 sentences. Applications can be for a closed area.Logical formLearned from3 sentences. Tours can be closed.Logical formLearned from3 sentences. An engine can be closed.Logical formLearned from3 sentences. An interior can be closed.Logical formLearned from3 sentences. A (power plant) can be closed.Logical formLearned from3 sentences. An emergency can be closed.Logical formLearned from3 sentences.