instruction:
In this task, you're expected to write answers to questions involving multiple references to the same entity. The answer to the question should be unambiguous and a phrase in the paragraph. Most questions can have only one correct answer.
question:
Passage: Whales are a widely distributed and diverse group of fully aquatic placental marine mammals. They are an informal grouping within the infraorder Cetacea, usually excluding dolphins and porpoises. Whales, dolphins and porpoises belong to the order Cetartiodactyla, which consists of even-toed ungulates. Their closest living relatives are the hippopotamuses, having diverged about 40 million years ago. The two parvorders of whales, baleen whales (Mysticeti) and toothed whales (Odontoceti), are thought to have split apart around 34 million years ago.  Whales consist of eight extant families: Balaenopteridae (the rorquals), Balaenidae (right whales), Cetotheriidae (the pygmy right whale), Eschrichtiidae (the grey whale), Monodontidae (belugas and narwhals), Physeteridae (the sperm whale), Kogiidae (the dwarf and pygmy sperm whale), and Ziphiidae (the beaked whales).
Whales are creatures of the open ocean; they feed, mate, give birth, suckle and raise their young at sea. So extreme is their adaptation to life underwater that they are unable to survive on land. Whales range in size from the 2.6 metres (8.5 ft) and 135 kilograms (298 lb) dwarf sperm whale to the 29.9 metres (98 ft) and 190 metric tons (210 short tons) blue whale, which is the largest creature that has ever lived. The sperm whale is the largest toothed predator on earth. Several species exhibit sexual dimorphism, in that the females are larger than males. Baleen whales have no teeth; instead they have plates of baleen, a fringe-like structure used to expel water while retaining the krill and plankton which they feed on. They use their throat pleats to expand the mouth to take in huge gulps of water. Balaenids have heads that can make up 40% of their body mass to take in water. Toothed whales, on the other hand, have conical teeth adapted to catching fish or squid. Baleen whales have a well developed sense of "smell", whereas toothed whales have well-developed hearing − their hearing, that is adapted for both air and water, is so well developed that some can survive even if they are blind. Some species, such as sperm whales, are well adapted for diving to great depths to catch squid and other favoured prey. 
Question: What are the types of whales that use throat pleats to expand the mouth?
answer:
Baleen.


question:
Passage: The unnamed Narrator is an automobile recall specialist who is unfulfilled by his job and possessions, and has developed severe insomnia. He finds catharsis by posing as a sufferer of testicular cancer and other afflictions in support groups, remedying his insomnia. His bliss is disturbed by another impostor, Marla Singer, whose presence reminds him he is attending these groups dishonestly. The two agree to split which groups they attend, but not before they exchange contact details on the premise of switching groups at short notice.
On a flight home from a business trip, the Narrator meets and interacts with soap salesman Tyler Durden. The Narrator returns home to find that his apartment has been destroyed by an explosion. Deciding against asking Marla for help, he calls Tyler, and they meet at a bar. Tyler says the Narrator is beholden to consumerism. In the parking lot, he asks the Narrator to hit him, and they begin a fistfight.
The Narrator is invited to move into Tyler's home: a large, dilapidated house in an industrial area. They have further fights outside the bar, which attract growing crowds of men. The fights move to the bar's basement where the men form Fight Club, which routinely meets for the men to fight recreationally.
Marla overdoses on pills and telephones the Narrator for help; he ignores her, but Tyler picks up the phone and goes to her apartment to save her. Tyler and Marla get sexually involved, and Tyler warns the Narrator never to talk to Marla about him. The Narrator blackmails his boss and quits his job. 
Question: What is the last name of the person who fistfights with the Narrator?
answer:
Durden.


question:
Passage: A Gainesville, Florida auto upholsterer George Gattling, played by Paul Giamatti, is a man out of place in the world and out of place in his own skin.
Gattling attempts to transcend his mundane life by training a wild red-tailed hawk. He owns University Custom Auto Shop and is the disgruntled patriarch of his family: his divorced sister, Precious, and her 20-year-old autistic son, Fred. He's also the unwitting case study of a "life-gone-wrong" for Betty, a young psychology student who works in the auto shop.
Gattling dreams of capturing and training hawks. It is an ancient art that requires precision (you only have a few days to succeed) and extremes (only through practically killing yourself and the bird are you brought together). It is the obsession he shares with Fred. In the quiet pre-dawn tracking of the birds, Gattling feels like a man temporarily freed from the absurdity of civilized life.
After several years of failed attempts, George and his nephew Fred capture the most magnificent bird they have ever seen—the red-tailed hawk. That night, Fred dies in a freak accident, drowning in his water bed. Grief-stricken, George sees his only chance to survive tied together with this bird. He becomes determined to tame her — meaning that he will not eat or sleep, nor will she, until it's all over. At his weakest moment, he locks himself into a battle of wills with the only creature on earth that would rather die than succumb. To the rest of the world, it appears George has gone mad; the closer he gets to achieving success, the crazier his family thinks he's become. Betty is the only one who realizes that George must take himself to the bottom to truly be saved. She watches as George is released into a world where the senses are awakened and emotions are unchecked—a world where one can see and feel the "blood of things". 
Question: What is the first name of the person who watches as George is released into the world where he can feel the blood of things?
answer:

Betty.