A vessel can be empty.Logical formLearned from20 sentences. A chest can be empty.Logical formLearned from20 sentences. A grid can be empty.Logical formLearned from20 sentences. A sequence can be empty.Logical formLearned from20 sentences. Cliches can be empty.Logical formLearned from20 sentences. An aquarium can be empty.Logical formLearned from20 sentences. An empty string may be returned.Logical formLearned from20 sentences. A thought can be empty.Logical formLearned from20 sentences. Titles can be empty.Logical formLearned from20 sentences. (Barber shop) may sit empty.Logical formLearned from20 sentences. A block can be empty.Logical formLearned from20 sentences. Galleries can be empty.Logical formLearned from20 sentences. A mug can be empty.Logical formLearned from20 sentences. A (plastic cup) can be empty.Logical formLearned from20 sentences. A foyer can be empty.Logical formLearned from20 sentences.