input question: A friend asked me to answer this question: What is the name of the state that saw its only historical decline in population over a twenty-year period ending in 1950?, using the article: Social tensions were exacerbated by the revival of the Ku Klux Klan after 1915. The Tulsa Race Riot broke out in 1921, with whites attacking blacks. In one of the costliest episodes of racial violence in American history, sixteen hours of rioting resulted in 35 city blocks destroyed, $1.8 million in property damage, and a death toll estimated to be as high as 300 people. By the late 1920s, the Ku Klux Klan had declined to negligible influence within the state.During the 1930s, parts of the state began suffering the consequences of poor farming practice. This period was known as the Dust Bowl, throughout which areas of Kansas, Texas, New Mexico and northwestern Oklahoma were hampered by long periods of little rainfall, strong winds, and abnormally high temperatures, sending thousands of farmers into poverty and forcing them to relocate to more fertile areas of the western United States. Over a twenty-year period ending in 1950, the state saw its only historical decline in population, dropping 6.9 percent as impoverished families migrated out of the state after the Dust Bowl. Soil and water conservation projects markedly changed practices in the state and led to the construction of massive flood control systems and dams; they built hundreds of reservoirs and man-made lakes to supply water for domestic needs and agricultural irrigation. By the 1960s, Oklahoma had created more than 200 lakes, the most in the nation.In 1995, Oklahoma City was the site of one of the most destructive acts of domestic terrorism in American history. The Oklahoma City bombing of April 19, 1995, in which Timothy McVeigh detonated a large, crude explosive device outside the Alfred P. Murrah Federal Building, killed 168 people, including 19 children. For his crime, McVeigh was executed by the federal government on June 11, 2001. His accomplice, Terry Nichols, is serving life in prison without parole for helping plan the attack and prepare the explosive.On May 31, 2016, several cities experienced record setting flooding., what would be the answer ????
output answer: Oklahoma

A friend asked me to answer this question: What is the last name of the person who sang with Roy in Mendelssohn's Elijah?, using the article: Ferrier gave her first London recital on 28 December 1942 at the National Gallery, in a lunch-time concert organised by Dame Myra Hess. Although she wrote "went off very well" in her diary, Ferrier was disappointed with her performance, and concluded that she needed further voice training. She approached the distinguished baritone Roy Henderson with whom, a week previously, she had sung in Mendelssohn's Elijah. Henderson agreed to teach her, and was her regular voice coach for the remainder of her life. He later explained that her "warm and spacious tone" was in part due to the size of the cavity at the back of her throat: "one could have shot a fair-sized apple right to the back of the throat without obstruction". However, this natural physical advantage was not in itself enough to ensure the quality of her voice; this was due, Henderson says, to "her hard work, artistry, sincerity, personality and above all her character". Ferrier's performances in the Glyndebourne run, which began on 12 July 1946, earned her favourable reviews, although the opera itself was less well received. On the provincial tour which followed the festival it failed to attract the public and incurred heavy financial losses. By contrast, when the opera reached Amsterdam it was greeted warmly by the Dutch audiences who showed particular enthusiasm for Ferrier's performance. This was Ferrier's first trip abroad, and she wrote an excited letter to her family: "The cleanest houses and windows you ever did see, and flowers in the fields all the way!" Following her success as Lucretia she agreed to return to Glyndebourne in 1947, to sing Orfeo in Gluck's opera Orfeo ed Euridice. She had often sung Orfeo's aria Che farò ("What is life") as a concert piece, and had recently recorded it with Decca. At Glyndebourne, Ferrier's limited acting abilities caused some difficulties in her relationship with the conductor, Fritz Stiedry; nevertheless her performance on the first night, 19 June 1947, attracted warm critical praise.Ferrier's association..., what would be the answer ?
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Answer: Ferrier

Problem: Given the question: A friend asked me to answer this question: What are the full names of the people Koch suspects is responsible for Blayden turning up dead?, using the article: Johnny O'Clock is a junior partner in a posh casino with Guido Marchettis. Complicating their longtime working relationship is Guido's wife Nelle, who is still in love with former boyfriend Johnny. She gives Johnny an expensive custom pocket watch, the twin of a birthday present she gave her husband, except Johnny's has a romantic engraving on the back. Johnny gives the watch, along with a rejection note, to Harriet Hobson, a hat-check girl at the casino, to return to Nelle. Harriet, however, apparently commits suicide using gas. Her sister Nancy shows up to find out what happened. She becomes attracted to Johnny. They eventually learn from Police Inspector Koch that Harriet was killed by poison. Harriet was dating Chuck Blayden, a crooked cop who is trying to persuade Guido to let him take Johnny's place. When Blayden also turns up dead, Koch suspects that either Johnny or Marchettis is responsible. Though Johnny tries to resist, little by little, he falls for Nancy. When Koch shows both Johnny and Marchettis Johnny's watch and note, Johnny tells Nancy their relationship is through and takes her to the airport. As he is driving away, however, he narrowly survives a drive-by shooting, and Nancy realizes he was only trying to protect her. She refuses to leave him. Johnny decides to flee to South America with Nancy, but not before brazenly cashing in his share of the casino. Marchettis pulls out a gun when Johnny's back is turned. They shoot it out; Marchettis is killed and Johnny wounded. Afterward, Nelle offers to testify it was self-defense, but only if he will come back to her. He refuses, so she tells Koch it was cold-blooded murder. Johnny's first instinct is to run away, but Nancy convinces him to give himself up., what would be the answer ?
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The answer is:
Guido Marchettis