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.
One example: Passage: Nearing London, Oliver encounters Jack Dawkins, a pickpocket more commonly known by the nickname the "Artful Dodger", and his sidekick, a boy of a humorous nature named Charley Bates, but Oliver's innocent and trusting nature fails to see any dishonesty in their actions. The Dodger provides Oliver with a free meal and tells him of a gentleman in London who will "give him lodgings for nothing, and never ask for change". Grateful for the unexpected assistance, Oliver follows the Dodger to the "old gentleman's" residence. In this way Oliver unwittingly falls in with an infamous Jewish criminal known as Fagin, the gentleman of whom the Artful Dodger spoke. Ensnared, Oliver lives with Fagin and his gang of juvenile pickpockets in their lair at Saffron Hill for some time, unaware of their criminal occupations. He believes they make wallets and handkerchiefs.
Solution is here: Who believes Fagin's gang make wallets and handkerchiefs?.
Explanation: This question is based on the following sentence in the passage "He believes they make wallets and handkerchiefs". It evaluates the understanding that the pronoun "he" refers to name "Oliver". You can ask questions like this one about most pronouns in a paragraph.

Now, solve this: Passage: Nickie Ferrante, a well-known playboy, meets Terry McKay aboard the transatlantic ocean liner SS Constitution en route from Europe to New York. Each is involved with someone else. After a series of meetings aboard the ship, they establish a friendship. When Terry joins Nickie on a brief visit to his grandmother Janou while the ship is anchored near her home at Villefranche-sur-Mer on the Mediterranean coast, she sees Nickie with new eyes and their feelings become deeper. During their visit, Janou tells Terry that Nickie is a talented painter but destroys most of his paintings because they don't meet his standards. As the ship returns to New York City, they agree to reunite at the top of the Empire State Building in six months' time if they have succeeded in ending their relationships and starting new careers.
On the day of their rendezvous, Terry, hurrying to reach the Empire State Building, is struck down by a car while crossing a street. Gravely injured, she is rushed to the hospital. Meanwhile, Nickie, waiting for her at the observation deck at the top of the building, is unaware of the accident and, after many hours, leaves at midnight, believing she has rejected him.
After the accident, Terry, now unable to walk, refuses to contact Nickie because of her disability. Instead, she finds work as a music teacher. Nickie has pursued his painting and has his work displayed by Courbet, an art shop owner. Six months after the accident, Terry sees Nickie with his former fiancée at the ballet, which she herself is attending with her former boyfriend. Nickie does not notice her condition because she is seated, and she says hello as he passes her.
Solution:
What is Terry's condition that goes unnoticed by Nickie when he sees her at the ballet?