(Glass cases) can be empty.Logical formLearned from21 sentences. A bookcase can be empty.Logical formLearned from21 sentences. A nonsense can be empty.Logical formLearned from21 sentences. A grate can be empty.Logical formLearned from21 sentences. The skies can be empty.Logical formLearned from21 sentences. An elevator can be empty.Logical formLearned from21 sentences. A calendar can be empty.Logical formLearned from21 sentences. A right can be empty.Logical formLearned from21 sentences. A bath can be empty.Logical formLearned from21 sentences. A server can be empty.Logical formLearned from21 sentences. An edge can be empty.Logical formLearned from21 sentences. Forums can be empty.Logical formLearned from21 sentences. Beaches can be empty.Logical formLearned from21 sentences. Some room can be empty.Logical formLearned from21 sentences. Smiles can be empty.Logical formLearned from21 sentences.