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: Lennon first met Yoko Ono on 9 November 1966 at the Indica Gallery in London, where Ono was preparing her conceptual art exhibit. They were introduced by gallery owner John Dunbar. Lennon was intrigued by Ono's "Hammer A Nail": patrons hammered a nail into a wooden board, creating the art piece. Although the exhibition had not yet begun, Lennon wanted to hammer a nail into the clean board, but Ono stopped him. Dunbar asked her, "Don't you know who this is? He's a millionaire! He might buy it." Ono had supposedly not heard of the Beatles, but relented on condition that Lennon pay her five shillings, to which Lennon replied, "I'll give you an imaginary five shillings and hammer an imaginary nail in." Ono subsequently related that Lennon had taken a bite out of the apple on display in her work Apple, much to her fury.Ono began to telephone and visit Lennon at his home. When Cynthia asked him for an explanation, Lennon explained that Ono was only trying to obtain money for her "avant-garde bullshit". While his wife was on holiday in Greece in May 1968, Lennon invited Ono to visit. They spent the night recording what would become the Two Virgins album, after which, he said, they "made love at dawn". When Lennon's wife returned home she found Ono wearing her bathrobe and drinking tea with Lennon who simply said, "Oh, hi." Ono became pregnant in 1968 and miscarried a male child on 21 November 1968, a few weeks after Lennon's divorce from Cynthia was granted.Two years before the Beatles disbanded, Lennon and Ono began public protests against the Vietnam War. They were married in Gibraltar on 20 March 1969, and spent their honeymoon at the Hilton Amsterdam, campaigning with a week-long Bed-In for Peace. They planned another Bed-In in the United States but were denied entry, so they held one instead at the Queen Elizabeth Hotel in Montreal, where they recorded "Give Peace a Chance". They often combined advocacy with performance art, as in their "Bagism", first introduced during a Vienna press conference. Lennon detailed this period in the Beatles song "The Ballad of John and Yoko". Lennon changed his name by deed poll on 22 April 1969, adding "Ono" as a middle name. The brief ceremony took place on the roof of the Apple Corps building, where the Beatles had performed their rooftop concert three months earlier. Although he used the name John Ono Lennon thereafter, official documents referred to him as John Winston Ono Lennon, since he was not permitted to revoke a name given at birth. The couple settled at Tittenhurst Park at Sunninghill in Berkshire. After Ono was injured in a car accident, Lennon arranged for a king-size bed to be brought to the recording studio as he worked on the Beatles' last album, Abbey Road.Ono and Lennon moved to New York, to a flat on Bank Street, Greenwich Village. Looking for somewhere with better security, they relocated in 1973 to the more secure Dakota overlooking Central Park at 1 West 72nd Street. 
Question: What are the last names of the two individuals who spent the night recording what would become the Two Virgins album?

SOLUTION: Lennon.

PROBLEM: Passage: An Army-OSRD council on 25 June 1942 decided to build a pilot plant for plutonium production in Red Gate Woods southwest of Chicago. In July, Nichols arranged for a lease of 1,025 acres (415 ha) from the Cook County Forest Preserve District, and Captain James F. Grafton was appointed Chicago area engineer. It soon became apparent that the scale of operations was too great for the area, and it was decided to build the plant at Oak Ridge, and keep a research and testing facility in Chicago.Delays in establishing the plant in Red Gate Woods led Compton to authorize the Metallurgical Laboratory to construct the first nuclear reactor beneath the bleachers of Stagg Field at the University of Chicago. The reactor required an enormous amount of graphite blocks and uranium pellets. At the time, there was a limited source of pure uranium. Frank Spedding of Iowa State University were able to produce only two short tons of pure uranium. Additional three short tons of uranium metal was supplied by Westinghouse Lamp Plant which was produced in a rush with makeshift process. A large square balloon was constructed by Goodyear Tire to encase the reactor. On 2 December 1942, a team led by Enrico Fermi initiated the first artificial self-sustaining nuclear chain reaction in an experimental reactor known as Chicago Pile-1. The point at which a reaction becomes self-sustaining became known as "going critical". Compton reported the success to Conant in Washington, D.C., by a coded phone call, saying, "The Italian navigator [Fermi] has just landed in the new world."In January 1943, Grafton's successor, Major Arthur V. Peterson, ordered Chicago Pile-1 dismantled and reassembled at Red Gate Woods, as he regarded the operation of a reactor as too hazardous for a densely populated area. At the Argonne site, Chicago Pile-3, the first heavy water reactor, went critical on 15 May 1944. After the war, the operations that remained at Red Gate moved to the new site of the Argonne National Laboratory about 6 miles (9.7 km) away. 
Question: What is the first name of the person who regarded the operation of a reactor as too hazardous for a densely populated area?

SOLUTION: Arthur.

PROBLEM: Passage: Broadway, New Year's Eve, 1928. A muckraking reporter, Waldo Winchester, frames four major stories during the wild New Year's Eve of 1928.
We meet the players in a diner. The Brain, a gangster with multiple girlfriends, is accompanied by a gambler named Regret (after the only horse he ever placed a winning bet) and an outsider who (with his bloodhounds) is being treated to a meal. Feet Samuels (so named because of his big feet) is in love with a showgirl named Hortense Hathaway, who is tossed out of the diner because of an unsavory reputation. Feet plans to have one wild night before committing suicide, having sold his body in advance to a medical doctor.
Harriet MacKyle, a sheltered but friendly socialite, makes arrangements with a smooth-talking fixer for a big party that night at her estate, where many of the players will later attend. She has an interest in the exciting but dangerous criminal element. A girl selling flowers comes in after Feet makes a full payment of a debt to the Brain, so the Brain offers $5 for a 5-cent flower, telling her to keep the change. But before he can leave, a hitman for the Brooklyn Mob stabs him.  The wounded Brain tells his men to take him "home." Unfortunately, his many girlfriends refuse to allow him in for various reasons.
Feet gets involved in a high-stakes craps game. With considerable luck, he wins a massive payoff of money and jewelry.  Regret suggests they find another game, but Feet reveals his plan to kill himself.  Regret tries to talk him out of it, but Feet, sworn to see his last promise fulfilled, is adamant. Regret dials up the reporter, who is now at MacKyle's party, and asks him to talk to Hortense (his niece) and get her to realize Feet is smitten with her.
Hortense must try to persuade Feet that she wants to quit her life as a lounge singer, move to New Jersey and raise a family. Regret, meanwhile, continues to be the world's unluckiest gambler, but showgirl Lovey Lou is in love with him anyway. 
Question: What is the nickname of the person who is refused entrance to his home?

SOLUTION:
The Brain.