A distance can be empty.Logical formLearned from20 sentences. A person may go empty.Logical formLearned from20 sentences. Streets of a US-city can be empty.Logical formLearned from20 sentences. (Shot glasses) can be empty.Logical formLearned from20 sentences. A courtyard can be empty.Logical formLearned from20 sentences. Terms can be empty.Logical formLearned from20 sentences. A hold can be empty.Logical formLearned from20 sentences. (Plastic cups) can be empty.Logical formLearned from20 sentences. A side can be empty.Logical formLearned from20 sentences. A city can be empty of residents.Logical formLearned from20 sentences. A (shoe box) can be empty.Logical formLearned from20 sentences. A castle can be empty.Logical formLearned from20 sentences. (Candy wrappers) can be empty.Logical formLearned from20 sentences. A stomache can be empty.Logical formLearned from20 sentences. Some percent can be empty.Logical formLearned from20 sentences.