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: In 1823, brash naval officer David Farragut boards the Essex and informs its commander, David Porter, that the Navy is commandeering the ship for a top-secret mission. Although the crew is overdue for shore leave, Porter, a cold, efficient leader, lies to them in order to coerce them to volunteer for the dangerous assignment. Farragut soon reunites with his old shipmate, Chief Petty Officer Link, who tries to convince him that Porter, who years earlier trained Farragut harshly in an attempt to teach him patience and discipline, is not as heartless as he appears. This starts to show itself when Porter later reconciles with Farragut about their past and agree to be civil with one another.
Once the ship is at sea, Porter and Farragut open their orders and are dismayed to discover their mission: to disguise themselves as pirates, with no ties to or protection from the United States, in order to track down pirates raiding the West Indies. One night soon after, Farragut is in charge of the ship when a storm hits. Link becomes trapped beneath a keg of rum from which he has tried to sneak a drink and Farragut is forced to break the ship's rudder to rescue him. Porter discovers the damage, but even when he threatens to court-martial Farragut, the officer refuses to inform on Link.
Within days, the supplies begin to run out, one of the crew contracts scurvy, and Porter steers the rudderless Essex to the West Indies for repairs and supplies. Farragut grows frustrated with the slow drift and, although Porter forbids anyone to enter the shark-infested waters, he tries to repair the rudder himself. When a shark attacks and Farragut's rope catches on a barnacle, he is barely rescued in time, and Porter chastises him again. Six days later, the men finally reach land and Porter orders Farragut and Link to gather supplies.
Solution:
What's the last name of the man the brash naval officer was trained by?