In this task, you are given a context, a subject, a relation, and many options. Based on the context, from the options select the object entity that has the given relation with the subject. Answer with text (not indexes).

Context: Harvard University is a private Ivy League research university in Cambridge, Massachusetts, established in 1636, whose history, influence, and wealth have made it one of the world's most prestigious universities., Gloria Johnson - Powell , MD ( born Gloria Johnson , c. 1937 ) is a child psychiatrist who is also an important figure in the American Civil Rights Movement and was one of the first African - American women to attain tenure at Harvard Medical School ., A medical school is a tertiary educational institutionor part of such an institutionthat teaches medicine, and awards a professional degree for physicians and surgeons. Such medical degrees include the Bachelor of Medicine, Bachelor of Surgery (MBBS, MBChB, BMBS), Doctor of Medicine (MD), or Doctor of Osteopathic Medicine (DO). Many medical schools offer additional degrees, such as a Doctor of Philosophy, Master's degree, a physician assistant program, or other post-secondary education., Harvard Medical School (HMS) is the graduate medical school of Harvard University. It is located in the Longwood Medical Area of the Mission Hill neighborhood of Boston, Massachusetts., Subject: gloria johnson-powell, Relation: occupation, Options: (A) doctor (B) physician (C) research
physician