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: The building was sold in 1549 by Buonaccorso Pitti, a descendant of Luca Pitti, to Eleonora di Toledo. Raised at the luxurious court of Naples, Eleonora was the wife of Cosimo I de' Medici of Tuscany, later the Grand Duke. On moving into the palace, Cosimo had Vasari enlarge the structure to fit his tastes; the palace was more than doubled by the addition of a new block along the rear. Vasari also built the Vasari Corridor, an above-ground walkway from Cosimo's old palace and the seat of government, the Palazzo Vecchio, through the Uffizi, above the Ponte Vecchio to the Palazzo Pitti. This enabled the Grand Duke and his family to move easily and safely from their official residence to the Palazzo Pitti. Initially the Palazzo Pitti was used mostly for lodging official guests and for occasional functions of the court, while the Medicis' principal residence remained the Palazzo Vecchio. It was not until the reign of Eleonora's son Francesco I and his wife Johanna of Austria that the palazzo was occupied on a permanent basis and became home to the Medicis' art collection.Land on the Boboli hill at the rear of the palazzo was acquired in order to create a large formal park and gardens, today known as the Boboli Gardens. The landscape architect employed for this was the Medici court artist Niccolo Tribolo, who died the following year; he was quickly succeeded by Bartolommeo Ammanati. The original design of the gardens centred on an amphitheatre, behind the corps de logis of the palazzo. The first play recorded as performed there was Andria by Terence in 1476. It was followed by many classically inspired plays of Florentine playwrights such as Giovan Battista Cini. Performed for the amusement of the cultivated Medici court, they featured elaborate sets designed by the court architect Baldassarre Lanci.
Question: What is the first name of the Grand Duke whose family was enabled to move easily and safely from their official residence?

SOLUTION: Cosimo.

PROBLEM: Passage: Paraceratherium is an extinct genus of hornless rhinoceros, and one of the largest terrestrial mammals that has ever existed. It lived from the early to late Oligocene epoch (3423 million years ago); its remains have been found across Eurasia between China and the Balkans. It is classified as a member of the hyracodont subfamily Indricotheriinae. Paraceratherium means "near the hornless beast", in reference to Aceratherium, the genus in which the type species P. bugtiense was originally placed.
The exact size of Paraceratherium is unknown because of the incompleteness of the fossils. Its weight is estimated to have been 15 to 20 tonnes (33,000 to 44,000 lb) at most; the shoulder height was about 4.8 metres (15.7 feet), and the length about 7.4 metres (24.3 feet). The legs were long and pillar-like. The long neck supported a skull that was about 1.3 metres (4.3 ft) long. It had large, tusk-like incisors and a nasal incision that suggests it had a prehensile upper lip or proboscis (trunk). The lifestyle of Paraceratherium may have been similar to that of modern large mammals such as the elephants and extant rhinoceroses. Because of its size, it would have had few predators and a slow rate of reproduction. It was a browser, eating mainly leaves, soft plants, and shrubs. It lived in habitats ranging from arid deserts with a few scattered trees to subtropical forests. The reasons for the animal's extinction are unknown, but various factors have been proposed.
Question: What quality of Paraceratherium's probably meant it didn't have many animals trying to eat it?

SOLUTION: its size.

PROBLEM: Passage: Nick Rivers, an American rock star, travels to East Germany (which is represented as like Hitler's regime) to perform at a cultural festival, which secretly serves the East German government as a diversion for a military operation with the intent of reuniting Germany under their rule. At a dinner, Nick encounters Hillary Flammond, a member of the local resistance movement, attempting to avoid the authorities. He pretends to be her date to get to know her, and performs an impromptu song and dance, mistakenly thinking he was asked to do so, to the delight of Hillary and the diners but to the annoyance of General Streck, the mastermind of the "reunification" plot.
Nick later sees Hillary at a ballet, where she expects to rendezvous with the resistance leader but she is met by the police instead. Nick saves her and they try to escape, but Nick turns himself in so that Hillary can get away. He is taken to a prison where he is questioned and tortured, but he knows nothing and does not break. In an escape attempt, he ends up in the secret prison lab of Dr. Paul Flammond, a brilliant scientist developing the "Polaris naval mine", a device that can destroy the entire NATO submarine fleet as part of the government's plot. The Germans force him to work by threatening to kill his daughter Hillary. Nick is recaptured and scheduled for execution.
Question: What is the last name of the person who performs a song and dance?

SOLUTION:
Rivers.