Magnetic-field lines can be closed.Logical formLearned from17 sentences. A bottom can be closed.Logical formLearned from17 sentences. A courthouse can be closed.Logical formLearned from17 sentences. A contact can be closed.Logical formLearned from17 sentences. A chest can be closed.Logical formLearned from17 sentences. A magazine can be closed.Logical formLearned from17 sentences. Membership can be closed.Logical formLearned from17 sentences. An audience can be closed.Logical formLearned from17 sentences. (Group cases) can be closed.Logical formLearned from17 sentences. A center may remain closed.Logical formLearned from17 sentences. A lab can be closed.Logical formLearned from17 sentences. (Gas stations) may remain closed.Logical formLearned from17 sentences. Flights to some destinations may remain closed.Logical formLearned from17 sentences. Facilities can be closed.Logical formLearned from17 sentences. A bazaar can be closed.Logical formLearned from17 sentences.