In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
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Question: The gunman who killed nine people last week at an Oregon college shot himself in front of his classmates after being wounded by two hero cops. Also revealed on Wednesday was that Umpqua Community College shooter Christopher Harper-Mercer, 26, was discharged from the Army after attempting to commit suicide. Harper-Mercer was discharged after one month of basic training at Fort Jackson, in South Carolina, in 2008. The Wall Street Journal reports that the Army wouldn't disclose details of the 2008 suicide attempt but that it indicates Harper-Mercer was deeply troubled long before he opened fire on his classmates last Thursday.Christopher Harper-Mercer, 26, shot himself in a classroom after being wounded by two hero cops who opened fireHarper-Mercer was discharged from the Army in 2008 for trying to commit suicideTodd Spingath was one of two officers to take down Oregon shooterHis partner and fellow vet, Joe Kaney, was identified earlier this weekThe pair have been hailed for preventing further potential devastationThey rushed into Umpqua Community College five minutes after alert 
 Question:At a Wednesday news conference, authorities said that two police officers in plainclothes were the first to confront Harper-_ after he began shooting at his morning writing class.

Answer: Mercer


Question: Nicolas Hamilton, the younger brother of Formula One world champion Lewis Hamilton, is to compete in this season’s British Touring Car Championship. Hamilton, who has cerebral palsy, will make his debut in June and becomes the first disabled driver to compete in the series. The 22-year-old will take part in five of the 10 rounds at Croft, Snetterton, Rockingham, Silverstone and the final meeting of the championship at Brands Hatch. Scroll down for video... Nicolas Hamilton posed a picture with his British Touring Car. The Briton said 'it's been a tough few months' Nicolas Hamilton, pictured with his older brother Lewis at the Indian Grand Prix in 2013Nicolas Hamilton will take part in five of the 10 championship roundsThe 22-year-old lives with the neurological condition cerebral palsyHe competed in the Renault Clio Cup in 2011 and 2012Nicolas is the younger brother of F1 world champion Lewis Hamilton 
 Question:Nicolas' brother Lewis Hamilton is bidding to become the first _ to successfully defend his Formula One title.

Answer: Briton


Question: (CNN) The teenager who shot dead nine people in Munich on Friday was a mentally troubled man who had extensively researched rampage killings and had no apparent links to ISIS, German police said. Authorities said the 18-year-old lone attacker -- who died of a self-inflicted gunshot wound -- had no political motivations. No references to religion were found in documents in his home in the southern German city. But investigators searching his belongings found numerous documents on rampage killings, including a book entitled "Rampage in My Mind -- Why Students Kill," said Robert Heimberger, president of the Bavarian state criminal police office.Neighbors identify 18-year-old attacker as Ali SonbolyMan had no connection to ISIS and no apparent political motive, police say 
 Question:_ police said the gunman's parents had been taken in for questioning.

Answer:
German