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.

[EX Q]: Passage: Two impecunious English sisters, Ellen and Agnes Isit (Dulcie Gray and Margaret Johnston), unexpectedly inherit a Neapolitan villa from a deceased uncle and move to Italy to view and sell their property. A local man, Salvatore, has since a boy been employed by the deceased uncle becoming major domo and he now manages the villa and its vineyard. Exploring her late uncles' studio, Ellen uncovers a painting of a nude Salvatore as Bacchus.
Soon Ellen becomes drawn to the carefree life of the locals and the romantic charisma of Salvatore, while the prudish Agnes resists. During the raucous revelry of the grape-treading festival, Agnes succumbs to her suppressed desire. Rushing to the balcony she cries out for Salvatore who drops Ellen and climbs from the grape vat and to her bed.  The pair are quickly married, and husband Salvatore now is master of the estate.
Soon, Ellen becomes aware of a change in Salvatore's behaviour towards Agnes.  Not long after the marriage, Agnes' health begins to deteriorate and Ellen's suspicions are aroused.  She expresses her concerns to a visiting English doctor, Benjamin Dench who is Agnes's former fiance'. Ellen is convinced that Agnes is being poisoned.  She enlists Dench's help in trying to prove that Salvatore is slowly murdering her sister with arsenic.  The villa once belonged to Salvatore's family and he has long been determined to regain ownership. Having poisoned his employer to inherit he had not anticipated the sisters arrival on the scene. 
Question: What is the name of the person Salvatore may be poisoning with arsenic?
[EX A]: Agnes Isit.

[EX Q]: 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?
[EX A]: Durden.

[EX Q]: Passage: Bulgaria occupies a portion of the eastern Balkan peninsula, bordering five countries—Greece and Turkey to the south, Macedonia and Serbia to the west, and Romania to the north. The land borders have a total length of 1,808 kilometres (1,123 mi), and the coastline has a length of 354 kilometres (220 mi). Its total area of 110,994 square kilometres (42,855 sq mi) ranks it as the world's 105th-largest country. Bulgaria's geographic coordinates are 43° N 25° E. The most notable topographical features are the Danubian Plain, the Balkan Mountains, the Thracian Plain, and the Rhodope Mountains. The southern edge of the Danubian Plain slopes upward into the foothills of the Balkans, while the Danube defines the border with Romania. The Thracian Plain is roughly triangular, beginning southeast of Sofia and broadening as it reaches the Black Sea coast.
The Balkan mountains run laterally through the middle of the country. The mountainous southwest has two distinct alpine ranges—Rila and Pirin, which border the lower but more extensive Rhodope Mountains to the east. Musala, at 2,925 metres (9,596 ft), is the highest point in both Bulgaria and the Balkan peninsula, and the Black Sea coast is the country's lowest point. Plains occupy about one third of the territory, while plateaux and hills occupy 41%. Most rivers are short and with low water levels. The longest river located solely in Bulgarian territory, the Iskar, has a length of 368 kilometres (229 mi). Other major rivers include the Struma and the Maritsa in the south.Bulgaria has a changeable climate, which results from being positioned at the meeting point of the Mediterranean and continental air masses combined with the barrier effect of its mountains. Northern Bulgaria averages 1 °C (1.8 °F) cooler, and registers 200 millimetres (7.9 in) more precipitation, than the regions south of the Balkan mountains. Temperature amplitudes vary significantly in different areas. The lowest recorded temperature is −38.3 °C (−36.9 °F), while the highest is 45.2 °C (113.4 °F). Precipitation averages about 630 millimetres (24.8 in) per year, and varies from 500 millimetres (19.7 in) in Dobrudja to more than 2,500 millimetres (98.4 in) in the mountains. Continental air masses bring significant amounts of snowfall during winter. 
Question: What country do the Balkan mountains run laterally through?
[EX A]:
Bulgaria.