Given the task definition and input, reply with output. 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: John Ottway works in Alaska as a marksman for an undisclosed oil company, killing grey wolves that threaten the drillers. On his last day on the job, he sees a driller  being pursued by a wolf and shoots it. He then watches and listens as the wolf takes a final breath ending in a long deep exhale. That evening, Ottway writes a letter "without purpose" to his wife, Ana, explaining his plans to commit suicide. He hears a distant wolf howl and doesn't follow through.
The next day, Ottway and other oil drillers board a plane. During the flight, Ottway dreams of sleeping with his wife in bed but is awakened by a loud bang. He buckles up in fear of a possible plane crash. Shortly afterwards, the back of the plane is torn off and it crashes. Eight people including Ottway survive the crash. However, a young oil worker, Lewenden, dies of his injuries as Ottway sadly watches. Taking charge, Ottway sets the survivors on the task of building a fire. While doing this, he discovers a corpse, and is attacked by the grey wolf feeding on it. After saving Ottway, the group soon surmises that they are in the wolves' territory. They decide to take turns keeping watch for the predators.
Later, Hernandez is killed by two wolves. Ottway suggests they leave the crash site, but Diaz questions his leadership. While searching for the wallets of their deceased colleagues, intending to return them to their families, Diaz finds an emergency wrist watch containing a radio beacon. The group then leaves the site.
What is the last name of the person attacked by a grey wolf that was feeding on a corpse?