TASK DEFINITION: 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.
PROBLEM: Passage: On New Year's Eve, Trotty, a poor elderly "ticket-porter" or casual messenger, is filled with gloom at the reports of crime and immorality in the newspapers, and wonders whether the working classes are simply wicked by nature. His daughter Meg and her long-time fiancé Richard arrive and announce their decision to marry next day. Trotty hides his misgivings, but their happiness is dispelled by an encounter with the pompous Alderman Cute, plus a political economist and a young gentleman with a nostalgia, all of whom make Trotty, Meg and Richard feel they hardly have a right to exist, let alone marry.
Trotty carries a note for Cute to Sir Joseph Bowley MP, who dispenses charity to the poor in the manner of a paternal dictator. Bowley is ostentatiously settling his debts to ensure a clean start to the new year, and berates Trotty because he owes a little rent and ten or twelve shillings to his local shop which he cannot pay off. Returning home, convinced that he and his fellow poor are naturally ungrateful and have no place in society, Trotty encounters Will Fern, a poor countryman, and his orphaned niece, Lilian. Fern has been accused of vagrancy and wants to visit Cute to set matters straight, but from a conversation overheard at Bowley's house, Trotty is able to warn him that Cute plans to have him arrested and imprisoned. He takes the pair home with him and he and Meg share their meagre food and poor lodging with the visitors. Meg tries to hide her distress, but it seems she has been dissuaded from marrying Richard by her encounter with Cute and the others. 
Question: Who warns the poor countryman that he will be arrested by the pompous man?

SOLUTION: Trotty.

PROBLEM: Passage: New York City's Central Park, an oasis that functions as the city's "green lung", was in a state of deterioration in the mid-1970s. Though Central Park had been designated a National Historic Landmark in 1962, at the start of the 1980s, the city lacked the financial resources to spend an estimated US$3,000,000 to restore or even to maintain the park. The nonprofit Central Park Conservancy was founded in 1980, and began a successful campaign to raise renovation funds.In the early 1980s, Parks Commissioner Gordon Davis, responsible for New York City's green areas, and Ron Delsener, one of the city's most influential concert promoters, developed the idea of helping Central Park financially with a free open-air concert, under the legal guidance of Bob Donnelly. The city would use profits from merchandising, television, and video rights to renovate the park. Earlier park performances by Elton John and James Taylor showed that this concept could be a success. Davis authorized the project, and Delsener entered discussions with cable TV channel HBO to decide who would perform.They decided on Simon & Garfunkel, a group that had formed in New York City in the 1960s, and had been one of the most successful folk rock groups through the late 60s/early 70s. Simon & Garfunkel had broken up at the height of their popularity and shortly after the release of their fifth studio album, Bridge Over Troubled Water, which is deemed to be their artistic peak and which topped the 1970 Billboard charts for ten weeks. They had grown apart artistically and did not get along well with each other. In the following eleven years, both continued musical careers as solo artists, and worked together only sporadically on single projects. Garfunkel made brief guest appearances at Simon's concerts, which were always successful.Delsener presented the plan to Paul Simon in the summer of 1981. Simon was enthusiastic about the idea, but questioned whether it could be financially successful, especially given the poor audience attendance of his last project, the autobiographical movie One-Trick Pony. Simon's confidence had declined and he had sought treatment for depression. He questioned whether he and Art Garfunkel could work together, but contacted Garfunkel, who was vacationing in Switzerland. Garfunkel was excited about the idea, and immediately returned to the US.From the promoter's viewpoint, Simon and Garfunkel were ideal choices. Not only were they likely to draw a large crowd to the concert, they also had roots in the city –  both had grown up and gone to school in Forest Hills, Queens. Music critic Stephen Holden pointed out that, unlike artists who had left in pursuit of lifestyles offered by other locales, the two had always been a part of New York City. Both gained inspiration from the cityscape and the cultural variety of New York, and spoke of these influences in their songs. 
Question: What is the name of the city that lacked the financial resources to spend an estimated US$3,000,000 to restore or even maintain its "green lung" at the start of the 1980s??

SOLUTION: New York City.

PROBLEM: Passage: If the pigeon became alert, it would often stretch out its head and neck in line with its body and tail, then nod its head in a circular pattern. When aggravated by another pigeon, it raised its wings threateningly, but passenger pigeons almost never actually fought. The pigeon bathed in shallow water, and afterwards lay on each side in turn and raised the opposite wing to dry it.The passenger pigeon drank at least once a day, typically at dawn, by fully inserting its bill into lakes, small ponds, and streams. Pigeons were seen perching on top of each other to access water, and if necessary, the species could alight on open water to drink. One of the primary causes of natural mortality was the weather, and every spring many individuals froze to death after migrating north too early. In captivity, a passenger pigeon was capable of living at least 15 years; Martha, the last known living passenger pigeon, was at least 17 and possibly as old as 29 when she died. It is undocumented how long a wild pigeon lived.The bird is believed to have played a significant ecological role in the composition of pre-Columbian forests of eastern North America. For instance, while the passenger pigeon was extant, forests were dominated by white oaks. This species germinated in the fall, therefore making its seeds almost useless as a food source during the spring breeding season, while red oaks produced acorns during the spring, which were devoured by the pigeons. The absence of the passenger pigeon's seed consumption may have contributed to the modern dominance of red oaks. Due to the immense amount of dung present at roosting sites, few plants grew for years after the pigeons left. Also, the accumulation of flammable debris (such as limbs broken from trees and foliage killed by excrement) at these sites may have increased both the frequency and intensity of forest fires, which would have favored fire-tolerant species, such as bur oaks, black oaks, and white oaks over less fire-tolerant species, such as red oaks, thus helping to explain the change in the composition of eastern forests since the passenger pigeon’s extinction (from white oaks, bur oaks, and black oaks predominating in presettlement forests, to the “dramatic expansion” of red oaks today). 
Question: What tree has dominated with the abscense of passenger pigeons?

SOLUTION:
red oaks.