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: Markham had hoped for a fully-fledged Royal Naval expedition, but was warned by the Admiralty that "the present exigencies of the Naval Service [would] prevent them from lending officers..." However, the Admiralty agreed to release Scott and Charles Royds, and later allowed Michael Barne and Reginald Skelton to join the expedition. The remaining officers were from the Merchant Marine, including Albert Armitage, the second-in-command, who had experience with the Jackson–Harmsworth Arctic expedition, 1894–97, and Ernest Shackleton, designated Third Officer in charge of holds, stores and provisions, and responsible for arranging the entertainments. The Admiralty also released around twenty petty officers and seamen, the rest of the crew being from the merchant service, or from civilian employment. Among the lower deck complement were some who became Antarctic veterans, including Frank Wild, William Lashly, Thomas Crean (who joined the expedition following the desertion of a seaman in New Zealand), Edgar Evans and Ernest Joyce. Although the expedition was not a formal Navy project, Scott proposed to run the expedition on naval lines, and secured the crew's voluntary agreement to work under the Naval Discipline Act.The scientific team was inexperienced. Dr George Murray, Gregory's successor as chief scientist, was due to travel only as far as Australia (in fact he left the ship at Cape Town), using the voyage to train the scientists, but with no part to play in the detailed work of the expedition. The only scientist with previous Antarctic experience was Louis Bernacchi, who had been with Borchgrevink as magnetic observer and meteorologist. The geologist, Hartley Ferrar, was a 22-year-old recent Cambridge graduate who Markham thought "might be made into a man." Marine biologist Thomas Vere Hodgson, from Plymouth Museum, was a more mature figure, as was the senior of the two doctors, Reginald Koettlitz, who, at 39, was the oldest member of the expedition. He, like Armitage, had been with the Jackson–Harmsworth expedition. The junior doctor and zoologist was Edward Wilson, who became close to Scott and provided the qualities of calmness, patience and detachment that the captain reportedly lacked.
Solution:
What is the last name of the man that inexperienced scientist replaced?