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: A young and naive Englishman, John Truscott, goes to the British colony of Sarawak, Borneo, to try to apply his father's work to the Iban society. There he meets his boss Henry Bullard and his wife Aggie Bullard. John tries to civilize them, building schools and providing education for the Iban people. He is met with unfamiliar local customs. Selima becomes his "sleeping dictionary", who sleeps with him and teaches him the language and the habits of the locals.
John is sent up river where a sickness is affecting the Yakata tribe. He and Selima travel inland. John witnesses a nearby mining operation run by Europeans. He notices that the Yakata have rice – which has been given to them by the miners – and he guesses correctly that the miners have poisoned the rice in order to get rid of the Yakata. Knowing that they will exact vengeance, John tells the Yakata what has happened. The Yakata wipe out the miners.
Despite their intents, the two find themselves falling into a forbidden love. John is eager to marry Selima despite the longhouse not allowing it. When John tells Henry about his plans to marry her, they lock Selima up. Selima then agrees to marry in the longhouse and they part ways. Bullard threatens to send him to trial for the death of the European miners. He makes a deal with John. John has to give up Selima, and go to Britain for a year's vacation and to meet the Bullards' daughter Cecilia. Another local British official, Neville Shipperly, a boorish drunk and a man who despises the locals, is jealous of John because he had planned to win Cecilia as his own.
Solution:
Who is the person that teaches the naive Englishman the habits of the locals?