Answer the following question: Given the following passage  "Health care and emergency medical service in the city of Paris and its suburbs are provided by the Assistance publique - Hôpitaux de Paris (AP-HP), a public hospital system that employs more than 90,000 people (including practitioners, support personnel, and administrators) in 44 hospitals. It is the largest hospital system in Europe. It provides health care, teaching, research, prevention, education and emergency medical service in 52 branches of medicine. The hospitals receive more than 5.8 million annual patient visits.",  answer the following question. Note that the answer is present within the text.  Question: Which of the following is not a service provided by the public hospital system: research, education, or suburbs?
Answer:
suburbs