Part 1. Definition
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.
Part 2. 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.
Answer: 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.
Part 3. Exercise
Passage: Vampires are finding their own undead bodies being mutated by the pollution of the host's blood, tainted with hard drugs and sexually transmitted diseases, alcohol, diabetes, anti-depressants, and cigarettes: substances that change the blood and makes it undrinkable for vampires.  The scarcity of good blood has incited an underground civil war between various groups of vampires.  A clique of 4 vampires, led by Benedict, struggle to find sustenance by seeking victims with untainted blood.  The group is being stalked by a samurai sword-wielding vampire-killing Priest, who leaves a note on the bodies of slain vampires in the form of a playing card inscribed with the words "Live Evil".  In order to survive both their race's own fierce infighting and the biological pollution found in human blood, the group desperately seeks out Max, a "blood pusher" who steals from hospital blood banks to offer the freshest and purest blood around. But they may not have time to enjoy it, because the vengeful Priest is hot on their trail.
Answer:
Who does Benedict's group get their blood from?