A city may remain closed to the world.Logical formLearned from12 sentences. Cafés can be closed.Logical formLearned from12 sentences. A (primary system) can be closed.Logical formLearned from12 sentences. Bases can be closed.Logical formLearned from12 sentences. A doors. can be closed.Logical formLearned from12 sentences. A proceeding can be closed.Logical formLearned from12 sentences. Stations can be closed.Logical formLearned from12 sentences. Itemsets can be closed.Logical formLearned from12 sentences. Games can be closed.Logical formLearned from12 sentences. An universe can be closed.Logical formLearned from12 sentences. An end can be closed.Logical formLearned from12 sentences. A (model structure) can be closed.Logical formLearned from12 sentences. Curves can be closed.Logical formLearned from12 sentences. A home can be closed.Logical formLearned from12 sentences. A database can be closed.Logical formLearned from12 sentences.