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.

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?
Durden.

Passage: Bryant identified "Son of Three" as an example of "when the Breeders set out to rock", noting "the chugging guitars and stomping drums." The Breeders re-recorded "Son of Three" in July 2002 for its release as Title TK's third single; this version is faster than the album track, and reflects the speed they were playing the song in concert that year. The lyrics of both "Son of Three" and "The She" suggest extended road trips with unknown outcomes. The album's next song, "Put on a Side", has a distinctive bassline and a cramped, repressive feel. Berger wrote that Kim Deal's "voice grinds sweetly, weariedly, sloppily inside your brain," as she repeats twelve words over the course of the song: "Better I better I stayed up / Better mono, put on a side."An earlier version of "Full on Idle", Title TK's eighth track, was released on the Amps' Pacer in 1995. In a 1997 interview, Deal expressed an interest in redoing multiple Amps songs, partially because she did not feel Pacer was well recorded. Bryant opined that both versions of "Full on Idle" sound almost the same, but The Village Voice's Jessica Grose wrote that the Breeders' rendition is noticeably slower. In Cibula's view, this version contains elements of country music, cumbia, and ska. The Guardian's Betty Clarke cited the line "Obey your colorist, bleach it all away" as an example of Title TK's amusing, off-center lyrics. On "Sinister Foxx", Deal repeatedly sings "Has anyone seen the iguana?" She has explained this as being a reference to buying marijuana: "Have you ever bought a bag of weed? You walk in, and the pot dealer's got an empty terrarium ... Every time I go to a pot dealer's house, there's no iguana." Another line, "I'm in beer class every Thursday night", refers to the alcohol awareness classes that Richard Presley attended after being caught driving while drunk. Phares described the song as having a "sexy menace", and Berger compared the drum part to gunshots and door-knocking.Moores identified in "Forced to Drive" the "quiet-LOUD-quiet" dynamic for which Deal's former band, the Pixies, are famous. Berger noticed a similar contrast between the song's "pop verses" and "the gloom of a twisty, malignant chorus". For Abbott, this four-chord chorus "approaches exuberance" in its mixture of catchy melody and grunge. The penultimate track, "T and T", was described by Bryant as an instrumental introduction leading into "Huffer". Kelley Deal has stated that these two songs share a thematic union: the latter is about the negative side of inhaling paint or other substances, while the former stands for "Toil and Trouble", also about the hardships that inhaling chemicals can cause. "Huffer" is, according to Moores, a lively, poppy track, and critics have commented on its "da-da-da" and "ah-ah" chorus. 
Question: What song was said to contain elements of country music, cumbia and ska?
Full on Idle.

Passage: Whales are known to teach, learn, cooperate, scheme, and grieve. The neocortex of many species of whale is home to elongated spindle neurons that, prior to 2007, were known only in hominids. In humans, these cells are involved in social conduct, emotions,  judgement, and theory of mind. Whale spindle neurons are found in areas of the brain that are homologous to where they are found in humans, suggesting that they perform a similar function.
Brain size was previously considered a major indicator of the intelligence of an animal. Since most of the brain is used for maintaining bodily functions, greater ratios of brain to body mass may increase the amount of brain mass available for more complex cognitive tasks. Allometric analysis indicates that mammalian brain size scales at approximately the ⅔ or ¾ exponent of the body mass. Comparison of a particular animal's brain size with the expected brain size based on such allometric analysis provides an encephalisation quotient that can be used as another indication of animal intelligence. Sperm whales have the largest brain mass of any animal on earth, averaging 8,000 cubic centimetres (490 in3) and 7.8 kilograms (17 lb) in mature males, in comparison to the average human brain which averages 1,450 cubic centimetres (88 in3) in mature males. The brain to body mass ratio in some odontocetes, such as belugas and narwhals, is second only to humans.Small whales are known to engage in complex play behaviour, which includes such things as producing stable underwater toroidal air-core vortex rings or "bubble rings". There are two main methods of bubble ring production: rapid puffing of a burst of air into the water and allowing it to rise to the surface, forming a ring, or swimming repeatedly in a circle and then stopping to inject air into the helical vortex currents thus formed. They also appear to enjoy biting the vortex-rings, so that they burst into many separate bubbles and then rise quickly to the surface. Some believe this is a means of communication. Whales are also known to produce bubble-nets for the purpose of foraging.
Larger whales are also thought, to some degree, to engage in play. The southern right whale, for example, elevates their tail fluke above the water, remaining in the same position for a considerable amount of time. This is known as "sailing". It appears to be a form of play and is most commonly seen off the coast of Argentina and South Africa. Humpback whales, among others, are also known to display this behaviour. 
Question: What is it called when a whale elevates their tail fluke above the water, remaining in the same position for a considerable amount of time?

sailing.