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

Problem: Passage: Sherlock Holmes and Dr. Watson are called to Whitechapel after learning about a series of strange murders only two years after the Jack the Ripper murders in the same neighborhood. The local belief is that the killings are the work of a vampire brought back from a recent mission in Guyana. As they investigate the deaths, they engage in an ongoing debate about the supernatural, with Watson believing in the possibility of vampires and Holmes remaining skeptical until he is able to prove the murders are the works of a living human, rather than any undead creature. At one point, the investigation leads them to the psychic Madame Karasky, who says that Holmes will be saved by the church. Shortly thereafter, Holmes is pushed in front of a moving carriage by the supposed vampire, only to be saved by a pedestrian. In order to catch the murderer, Holmes disguises himself as a monk and reveals that the vampire was Brother Abel, who hoped to get revenge on the monks who didn't listen to him when he believed that the bats were causing rabies in the South American mission, when he was infected. The film ends at Baker Street, when Mrs. Hudson gives Holmes his pipe, delivered by the same man that saved Holmes from being run over. When Holmes asks his name, Mrs. Hudson says his name was Reginald Church.
Solution: Where is the vampire committing murders?