Teacher: 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.
Teacher: Now, understand the problem? If you are still confused, see the following 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: Who believes Fagin's gang make wallets and handkerchiefs?.
Reason: 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 instance: Passage: 3 of Hearts' vocals and image received praise from music critics following the album's release. Billboard described the trio as "possess[ing] angelic voices" and praised 3 of Hearts as "ear candy". D Magazine said the album's pop composition could allow the group to have a crossover appeal, and compared them to the Dixie Chicks. Stephen Thomas Erlewine praised the album as well-constructed and appealing, but criticized several songs – specifically "Over the Edge" – as sounding dated. He positively compared the trio's vocals to those of American band Rascal Flatts, and preferred their wholesome image over the more sexualized one attached to American singer Willa Ford. In a mixed review, Mario Tarradell of the Knight Ridder Tribune described the music as "breezy" and "refreshing", but noted that it was not innovative.Commentators criticized 3 of Hearts and the trio's vocals as generic and lacking an authentic country sound. Country Standard Time's Dan MacIntosh called the album manufactured, describing its content as "impersonal, yet functional, songs". He responded negatively to the lack of attitude in the group's voices, which he dismissed as "girlishly giddy vocals and pop-ish country backing". Editor Tom Roland, writing for the American Bar Association, panned the album's content for its "bright, but shallow declarations of puppy love". Even though he praised the trio as talented, he said their vocals had "none of the life experience that has been a traditional hallmark of country recordings".
Student:
What is the last name of the person who positively compared the trio's vocals to those of the American band Rascal Flatts?