Territories can be empty.Logical formLearned from11 sentences. A role can be empty.Logical formLearned from11 sentences. Some chairs can be empty.Logical formLearned from11 sentences. A battlefield can be empty.Logical formLearned from11 sentences. A definition can be empty.Logical formLearned from11 sentences. A period can be empty.Logical formLearned from11 sentences. A method may return an empty string.Logical formLearned from11 sentences. A cockpit can be empty.Logical formLearned from11 sentences. A carpark can be empty.Logical formLearned from11 sentences. An arm can be empty.Logical formLearned from11 sentences. A suffix can be an empty string.Logical formLearned from11 sentences. Sentences can be empty.Logical formLearned from11 sentences. A tarmac can be empty.Logical formLearned from11 sentences. An alternative can be empty.Logical formLearned from11 sentences. A study can be empty.Logical formLearned from11 sentences.