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: Mike Regan is a self-made aviation tycoon who lives in a state-of-the-art smart house full of modern technology with his wife Rose and 17-year-old daughter Kaitlyn. Mike's company is developing an app called "Omni Jet" which will increase business while the company raises much-needed financial capital with a stock offering. However, it requires U.S. Securities and Exchange Commission approval.
At the company, Mike meets Ed Porter, a 28-year-old information technology consultant and calls him to fix his home's Wi-Fi signal, which his daughter complains is slow. Porter also upgrades the Global Positioning System in Mike's car and claims that he also worked at the National Security Agency and had taken part in a military exercise in Kandahar.
Porter meets Kaitlyn and starts a relationship with her through social media, but Mike fires him after Kaitlyn invites Porter into the house; this ends his promising career at the company. Devastated, Porter begins to remotely access Mike's private data and his house as he covertly monitors them through the security cameras and devices all over the house. He also spies on Kaitlyn and secretly records her masturbating in the shower.
Porter sends fake emails to Mike's clients and the SEC, threatening the company's survival. He also takes full control of the house's technology, which leaves the family terrified. He uses a spoof email to send Rose fake mammogram results, saying that she tested positive for breast cancer. Rose is extremely distressed, but her test results were actually negative according to her attending physician. After Mike becomes aware that Porter has done this, he attacks Porter and threatens to kill him if he does not stay away from his family.
Solution:
What is the last name of the person who claims that he also worked at the NSA?