A (brick building) can be empty.Logical formLearned from11 sentences. A tomb of a deity can be empty.Logical formLearned from11 sentences. A (night sky) can be empty.Logical formLearned from11 sentences. A newsroom can be empty.Logical formLearned from11 sentences. A (war chest) can be empty.Logical formLearned from11 sentences. A subject line can be empty.Logical formLearned from11 sentences. A (file name) may become an empty string.Logical formLearned from11 sentences. Attributes can be empty.Logical formLearned from11 sentences. Formulas can be empty.Logical formLearned from11 sentences. (Aluminum cans) can be empty.Logical formLearned from11 sentences. A (target file) can be empty.Logical formLearned from11 sentences. Next door can be empty.Logical formLearned from11 sentences. Podiums can be empty.Logical formLearned from11 sentences. Pens can be empty.Logical formLearned from11 sentences. A (gallon jug) can be empty.Logical formLearned from11 sentences.