instruction:
In this task, you're given passages that contain mentions of names of people, places, or things. Some of these mentions refer to the same person, place, or thing. Your job is to write questions that evaluate one's understanding of such references. Good questions are expected to link pronouns (she, her, him, his, their, etc.) or other mentions to people, places, or things to which they may refer. Do not ask questions that can be answered correctly without understanding the paragraph or having multiple answers. Avoid questions that do not link phrases referring to the same entity. For each of your questions, the answer should be one or more phrases in the paragraph, and it should be unambiguous.
question:
Passage: With an average flow at the mouth of about 37,400 cubic feet per second (1,060 m3/s), the Willamette ranks 19th in volume among rivers in the United States and contributes 12 to 15 percent of the total flow of the Columbia River. The Willamette's flow varies considerably season to season, averaging about 8,200 cubic feet per second (230 m3/s) in August to more than 79,000 cubic feet per second (2,200 m3/s) in December.
The U.S. Geological Survey (USGS) operates five stream gauges along the river, at Harrisburg, Corvallis, Albany, Salem, and Portland. The average discharge at the lowermost gauge, near the Morrison Bridge in Portland, was 33,220 cubic feet per second (941 m3/s) between 1972 and 2013. Located at river mile (RM) 12.8 or river kilometer (RK) 20.6, the gauge measures the flow from an area of 11,200 square miles (29,000 km2), roughly 97 percent of the Willamette basin. The highest flow recorded at this station was 420,000 cubic feet per second (11,893 m3/s) on February 9, 1996, during the Willamette Valley Flood of 1996, and the minimum was 4,200 cubic feet per second (120 m3/s) on July 10, 1978. The highest recorded flow of 635,000 cubic feet per second (18,000 m3/s) for the Willamette at a different gauge in Portland occurred during a flood in 1861. This and many other large flows preceded the Flood Control Act of 1936 and dam construction on the Willamette's major tributaries.The river below Willamette Falls, 26.5 miles (42.6 km) from the mouth, is affected by semidiurnal tides, and gauges have detected reverse flows (backwards river flows) upstream from Ross Island at RM 15 (RK 24). The National Weather Service issues tide forecasts for the river at the Morrison Bridge.
answer:
In what month is the flow of the WIllamette the lowest?

question:
Passage: Medina gets up after hearing a voice in her dreams. She prepares to go out, has a coffee, and does a quick breath relaxation exercise. Her friend, Sidonia, arrives and finds Medina, who is looking at herself in the mirror with a sad expression. Sidonia tries to lighten the moment, and reminds Medina that her friends and family are waiting for her. Medina gets herself together and they head off to the funeral service for Medina's fiance.
Medina is with her friend Tesla, who tells her she is love with Medina's brother, Enzo, and is thinking of getting engaged. Medina is a bit surprised, but congratulates her. They try to visit an art exhibit, but the female security guard kicks them out, as she remembers the duo's wild reputation. Medine is upset, but Tesla invites her and Enzo for drinks. Tesla and Enzo cheer Medina up with their light conversation.

Quinn looks depressed as he meets up with his friend Fera at the street. He tells her that Nilda left him and took everything, including his possessions. He shows her the "Dear John letter" composed on bath tissue. Fera's husband, Camden, arrives and they explain the situation. Fera and Camden console Quinn but he leaves to clear his mind. They follow Quinn to make sure he does not do something regretful.
Tesla reminds Medina of an upcoming martial arts promotion test. Medina prepares by doing some stretching, practicing footwork, and twirling weapons including swords, staffs and spears. Meanwhile, Fera is increasingly concerned about Quinn. Camden notes that Fera and Quinn act like siblings, but for now, all they can do is continue to look after Quinn. They head to a show at the Lincoln Center.
answer:
Who wrote Quinn a Dear John Letter?

question:
Passage: In the year 2023 in a dystopian future, Sentinels have been programmed to identify and hunt down mutants and any humans who dared to help them. A small band of X-Men survivors is attacked, and Kitty Pryde sends Bishop's consciousness back in time a few days before the attack, to warn the others as to ensure their survival.
The group later meets Professor Charles Xavier at a remote Chinese temple, where he explains the history of the Sentinels, which were designed by Bolivar Trask, whom Mystique assassinated in 1973. Alarmed by Trask's death, the government forces captured Mystique and experimented on her, using her DNA to advance the Sentinel program, thus allowing them to adapt to nearly every mutant power. Xavier and Magneto plan to use Pryde's ability to prevent Trask's assassination and prevent the apocalyptic future. But since Xavier would not survive going back decades, Wolverine volunteers, since his regenerative powers would allow him to survive the process.
After awakening in his younger body in 1973, Wolverine arrives at the X-Mansion, discovering that the school has been shut down for years due to many students and staff being drafted to the Vietnam War, and that Erik Lensherr was arrested for killing John F. Kennedy. A young, broken Xavier turned to alcoholism and has shunned his mutant powers by using a specialized serum that suppresses his telepathic abilities in order to walk. Hoping to reunite with Mystique, Xavier agrees to help Wolverine and breaks Lensherr out of his prison cell under the Pentagon, aided by Hank McCoy and Peter Maximoff.
answer:
What is the last name of the person who explains the history of the Sentinels?