A (shopping mall) can be empty.Logical formLearned from10 sentences. Oceans can be empty.Logical formLearned from10 sentences. A call can be empty.Logical formLearned from10 sentences. Clusters can be empty.Logical formLearned from10 sentences. A spot can be empty.Logical formLearned from10 sentences. A shoebox can be empty.Logical formLearned from10 sentences. A pad can be empty.Logical formLearned from10 sentences. (Inkjet cartridges) can be empty.Logical formLearned from10 sentences. Hoppers can be empty.Logical formLearned from10 sentences. A channel can be empty.Logical formLearned from10 sentences. A ferry can be empty.Logical formLearned from10 sentences. A (city center) can be empty.Logical formLearned from10 sentences. A main building can be empty.Logical formLearned from10 sentences. Some post can be empty.Logical formLearned from10 sentences. A post can be empty in a (power vacuum).Logical formLearned from10 sentences.