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.
One 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.
Solution is here: Who believes Fagin's gang make wallets and handkerchiefs?.
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.

Now, solve this: Passage: There are two Campfire Circles which are used extensively during the peak camping season. The Large Campfire Circle has a Maori Gatewat which was presented by the Scouts New Zealand in 1951.
The Lime Walk, constructed by previous estate owner Margaret Chinnery, surrounds the Training Ground which was the original main lawn area of the White House. Few of the Lime trees survive to this day. On this path sits the Jim Green Gate, a 1930 tribute to Jim Green, an editor of The Scouter magazine.
The Buffalo Lawn is so called because of the replica of the Boy Scouts of America (BSA) Silver Buffalo Award that was presented by the Boy Scouts of America in 1926. This was to honour the Unknown Scout that helped William D. Boyce bring Scouting to the United States. Located there is a signpost with the directions and distances to all the World Scout Jamborees from Gilwell Park. Surrounding the Buffalo Lawn is part of the original balustrade of London Bridge which was re-built in 1820. The sections were moved to Gilwell Park after being purchased at auction in 1826.
Considered by many to be the most important Scouting site, The Training Ground is where Wood Badge training was historically held and where the Gilwell oak tree is located. Contrary to popular belief, the Wood Badge beads have never been made of Gilwell Oak. On the Training Ground sits the Gidney Cabin, a memorial to the first Camp Chief, Francis Gidney, in 1929. Across from the Gidney Cabin is the Thurman Memorial, in memory of Camp Chief John Thurman.
The caravan trailer, presented to Chief Scout Sir Robert Baden-Powell, along with a new Rolls-Royce car, during the 3rd World Scout Jamboree in 1929 is on display during the summer months. The caravan was nicknamed Eccles. The car, nicknamed Jam Roll, was sold after his death by Olave Baden-Powell in 1945.
Gilwell Park also has a number of other smaller memorials, statues, and places and objects of historical or Scouting importance.
Solution:
Whose car was nicknamed Jam Roll?