Given the task definition, example input & output, solve the new input case.
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.
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.
Output: Who believes Fagin's gang make wallets and handkerchiefs?.
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 case for you: Passage: "City of Angels" is a synthrock song with influences and elements from experimental music. It opens with an instrumental section and "gently burbling" synthesizers. It follows with the sounds of drum beats, including taiko drums, then transitions into a piano melody. After the first verse, the chorus follows, with Leto singing, "Lost in the City of Angels / Down in the comfort of strangers / I found myself in the fire burned hills / In the land of a billion lights". During the bridge, he ornaments his vocal lines with melodic crescendos, affirming "I am home". After the final chorus, the song reaches a drum-heavy climax. Emily Zemler from Billboard cited "City of Angels" as an example of variety and experimentation in Love, Lust, Faith and Dreams. She described the song as a "pulsating, subtler track that employs a blipping electronic beat rather than the band's usual rock backdrop".In a preview of the record, Jeff Benjamin from Fuse acknowledged the 1980s influences that resonated throughout the track and noted that "hard rock guitars and percussion come crashing in on the chorus." Sarah O' Hara, while reviewing Love, Lust, Faith and Dreams for Lowdown, compared the song to "Kings and Queens", a track with a similar structure included on This Is War featuring sparse verses and slow atmospheric builds to the chorus. In an interview with Loudwire, Leto described "City of Angels" as a very personal song about a specific place. He said, "It's the story of my brother and I going to Los Angeles to make our dreams come true. It's a love letter to that beautiful and bizarre land." Leto later explained that the song could refer to any place a person goes to fulfill his or her own dreams. Mary Ouellette, writing for Loudwire, felt that the song "tells a passionate tale of finding comfort in calling the city of Los Angeles home.".
Output:
What is the last name of the person who described "City of Angels" as a "pulsating, subtler track that employs a blipping electronic beat rather than the band's usual rock backdrop"?