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.

Let me give you an 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.
The answer to this example can be: Who believes Fagin's gang make wallets and handkerchiefs?.
Here is 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.

OK. solve this:
Passage: Julia, a young woman in her mid 20s who makes money as a thief in seedy nightclubs, is abducted from her home and wakes up imprisoned in a jail cell with a glowing implant in the back of her neck. Two other subjects are with her. After multiple sessions of psychological torture, she destroys the cell and adjacent lab in an escape attempt. The two other subjects are killed by a robot, Aries, run by an artificial intelligence named Tau. Aries is about to kill Julia when Alex, the man who has been torturing her arrives and stops it.
Alex reveals that the electrical implant is collecting Julia's neural activity for an AI project. Destroying the lab has set his research back. In the face of a two-week deadline, Alex keeps Julia a prisoner in his house and insists that she complete puzzles and cognitive tests. While Alex is away at work each day, Julia converses with Tau about the world outside the house. It is clear that, although intelligent in its own ways, Tau is extremely naive and ignorant of how people feel or the world at large. While Tau begins to understand the harm in Julia's situation, its programming prevents it from releasing her. In exchange for information about the outside world, Tau slowly reveals more information about the house, as well as Alex's experiments.
Julia sneaks a look at Alex's tablet and discovers that 10 other subjects have died in his experiments. Seeing her fingerprint on the tablet, Alex assumes that Tau has slipped up in its cleaning duties and punishes it by erasing code or "memories" with a button on a small remote, delivering a form of pain to the AI. Julia notices that Tau's monitoring of her shuts down during its punishment and so she hides a steak knife on the floor next to the kitchen table.
Answer:
What is the name of the person who hides a steak knife?