Detailed Instructions: In this task, you're given passages that contain mentions of names of people, places, or things. Some of these mentions refer to the same person, place, or thing. Your job is to write questions that evaluate one's understanding of such references. Good questions are expected to link pronouns (she, her, him, his, their, etc.) or other mentions to people, places, or things to which they may refer. Do not ask questions that can be answered correctly without understanding the paragraph or having multiple answers. Avoid questions that do not link phrases referring to the same entity. For each of your questions, the answer should be one or more phrases in the paragraph, and it should be unambiguous.
Q: Passage: In the mid-1970s, Theresa Dunn, a young Irish-American school teacher in New York City, experiences her sexual awakening, while searching for excitement outside her ordered life. While in college, Theresa lives with her repressive Polish-Irish Catholic parents, and suffers from severe body image issues following a childhood surgery for scoliosis that left a large scar on her back. Theresa later finds out that her scoliosis is congenital, and that her aunt had the same condition and committed suicide. As a result, Theresa is reluctant to have children of her own. 
Meanwhile, her beautiful "perfect" older sister, Katherine, has left her husband and embarked on a wild lifestyle involving multiple affairs, a secret abortion, recreational drug use, and a short-lived marriage to a Jewish man. Theresa finds first love, and loses her virginity, to her much older, married college professor Martin. He ends their affair just before her graduation, leaving Theresa feeling used and lonely.
Theresa takes a job teaching deaf children, and proves to be a gifted and caring teacher. With Katherine's encouragement, she moves out of her parents' home and into an apartment in Katherine's building. She frequents a bar at night where she meets a charming but vain Italian-American character named Tony. She ends up sleeping with, and taking cocaine with Tony. He leaves in a hurry, and gives her a Quaalude pill to counteract the cocaine. This causes her to oversleep, and she arrives very late for work the next day, angering her employer and students. Tony then disappears for a long while, and Theresa misses him initially.
A:
What is the first name of the person whose back has a large scar?