You will be given a definition of a task first, then some input of the task.
This task is about reading the given passage and construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) its answer is a continuous text span from the paragraph. Avoid creating questions that (i) can be answered correctly without actually understanding the paragraph and (ii) uses same words or phrases given in the passage.

Plymouth is served by Plymouth Hospitals NHS Trust and the city's NHS hospital is Derriford Hospital 4 miles (6 km) north of the city centre. The Royal Eye Infirmary is located at Derriford Hospital. South Western Ambulance Service NHS Foundation Trust operates in Plymouth and the rest of the south west; its headquarters are in Exeter.
Output:
What is Plymouth's National Health Service hospital?