Billboards can be empty.Logical formLearned from10 sentences. A (rice bowl) can be empty.Logical formLearned from10 sentences. A (store front) can be empty.Logical formLearned from10 sentences. Floors can be empty.Logical formLearned from10 sentences. A brass can be empty.Logical formLearned from10 sentences. Eye-sockets can be empty.Logical formLearned from10 sentences. A book can be empty.Logical formLearned from10 sentences. Works can be empty.Logical formLearned from10 sentences. A (nitrogen tank) can be empty.Logical formLearned from10 sentences. A chapel can be empty.Logical formLearned from10 sentences. Cores can be empty.Logical formLearned from10 sentences. Canisters can be empty.Logical formLearned from10 sentences. (Fruit bunches) can be empty.Logical formLearned from10 sentences. A change can be empty.Logical formLearned from10 sentences. A level can be empty.Logical formLearned from10 sentences.