You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
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.

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: Who believes Fagin's gang make wallets and handkerchiefs?.
Why? 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.

New input: Passage: Medina gets up after hearing a voice in her dreams. She prepares to go out, has a coffee, and does a quick breath relaxation exercise. Her friend, Sidonia, arrives and finds Medina, who is looking at herself in the mirror with a sad expression. Sidonia tries to lighten the moment, and reminds Medina that her friends and family are waiting for her. Medina gets herself together and they head off to the funeral service for Medina's fiancé.
Medina is with her friend Tesla, who tells her she is love with Medina's brother, Enzo, and is thinking of getting engaged. Medina is a bit surprised, but congratulates her. They try to visit an art exhibit, but the female security guard kicks them out, as she remembers the duo's wild reputation. Medine is upset, but Tesla invites her and Enzo for drinks. Tesla and Enzo cheer Medina up with their light conversation.

Quinn looks depressed as he meets up with his friend Fera at the street. He tells her that Nilda left him and took everything, including his possessions. He shows her the "Dear John letter" composed on bath tissue. Fera's husband, Camden, arrives and they explain the situation. Fera and Camden console Quinn but he leaves to clear his mind. They follow Quinn to make sure he does not do something regretful.
Tesla reminds Medina of an upcoming martial arts promotion test. Medina prepares by doing some stretching, practicing footwork, and twirling weapons including swords, staffs and spears. Meanwhile, Fera is increasingly concerned about Quinn. Camden notes that Fera and Quinn act like siblings, but for now, all they can do is continue to look after Quinn. They head to a show at the Lincoln Center.
Solution:
Who wrote Quinn a Dear John Letter?