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: Suddenly, London goes dark and loses all of its electricity. There is commotion at a cinema, with people demanding their money back. The owner of the cinema, Karl Verloc, enters through a back entrance to the living quarters above, and pretends to have been asleep and not know anything of the blackout. His wife, Mrs. Verloc comes to get him and is surprised to see him, but he informs her that he had been sleeping the entire time. He instructs his wife to return the money to the customers against her protests because he has "some money coming in." As the money is about to be disbursed to the customers downstairs, the lights go back on. It is revealed that sand was put in the boilers as an act of sabotage on London's electricity grid.
The next day, Verloc meets with his contact and it is revealed that he is part of a gang of terrorists from an unnamed European country who are planning a series of attacks in London, though their exact motives are not made clear. Verloc's contact is disappointed that the newspapers mocked the short loss of electricity, and instructs Verloc to place a parcel of "fireworks" at the Piccadilly London Underground station. Verloc tells the contact that he is not comfortable with any act that would cause the loss of life.
Meanwhile, Scotland Yard suspects Verloc's involvement in the plot and assigns Detective Sergeant Ted Spencer to investigate Verloc. Spencer is initially undercover as a greengrocer's helper next to the cinema, and befriends Mrs. Verloc and her little brother, Stevie, who lives with them, by treating them to a fancy dinner. At this point, Spencer and Scotland Yard are unsure whether Mrs. Verloc is complicit in the terrorist plots or merely innocently unaware.
Answer:
Who is the brother of the boy the sergeant befriends?