A rack can be closed.Logical formLearned from6 sentences. Data can be closed.Logical formLearned from6 sentences. Lakes can be closed.Logical formLearned from6 sentences. A closed end may pertain-to a condom.Logical formLearned from6 sentences. A stream can be closed.Logical formLearned from6 sentences. A mansion can be closed.Logical formLearned from6 sentences. A plane can be closed.Logical formLearned from6 sentences. A day can be closed.Logical formLearned from6 sentences. Ponds can be closed.Logical formLearned from6 sentences. (Record reviews) can be closed.Logical formLearned from6 sentences. Materials can be closed.Logical formLearned from6 sentences. Cages can be closed.Logical formLearned from6 sentences. A (user agent) can be a closed system.Logical formLearned from6 sentences. A checkpoint can be closed.Logical formLearned from6 sentences. A database can be closed.Logical formLearned from6 sentences.