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.

[EX Q]: Passage: In the late 19th and early 20th centuries, child vaudevillian Buster Keaton stays in boarding houses, rides in train boxcars, and performs with his mother and father in a knock-about (physical comedy) act called The Three Keatons. As a young man Keaton travels on his own to Hollywood and tricks his way onto the grounds of silent-film studio Famous Studio as a workman carrying a board, as in one of his trademark comic bits. 
Sneaking onto a set, he attracts the attention of a young casting director, Gloria Brent. He demonstrates his type of physical comedy to a director Kurt Bergner, whom he does not impress. But Gloria recognizes his talent and recommends him to studio head Larry Winters, who offers him a contract. Keaton begins to get small parts in other people's pictures. As his comic talent becomes more apparent and his fame and money-making power grows, he is offered a contract to direct and star in his own silent films.
Dissatisfied with not sharing the profits of his films, he is told that he must invest in his own pictures in order to profit-share. He does in "The Gambler", which is released at the same time as Al Jolson's blockbuster talkie, "The Jazz Singer", reducing public interest in it. Buster struggles to adapt to performing in talking pictures.
[EX A]: What is the full name of the person who fails to impress Kurt Bergner?

[EX Q]: Passage: In 2007, Elderly sold more than 16,000 instruments. The company is a  dealer of Martin guitars, as well as other mainstream brands such as Guild and Fender. It sells used Gibson instruments, but not new models as a result of the Gibson lawsuit. Although the bulk of its business comes from guitar sales, the company carries a range of other instruments, such as banjos, ukuleles, mandolins, accordions, concertinas, bouzoukis, sitars, musical saws, and African thumb pianos. Some of the rarer instruments are purchased as collectibles. Elderly is an exclusive retailer of "LunchBox-A-LeLes", ukuleles made from various tin lunch box designs. The journal Bluegrass Unlimited has noted Elderly Instruments for carrying "elite" brands of instruments, such as Paul Duff mandolins, Huss & Dalton acoustic guitars, Stelling banjos, and Nash electric guitars. Elderly was once one of only two American retailers for Apitius Mandolins, now only sold directly. As part of its consignment business, Elderly sells "collections" of instruments that sometimes have rich histories. In September 2006, it placed the Dopyera family's personal collection of resonator instruments up for sale, including some of the Dobro and National brands. The Dopyera family was responsible for founding those companies and innovating the resonator instrument trade.Elderly Instruments carries a number of Martin guitars, including valuable vintage models. In interviews, Werbin frequently mentions Martins made before World War II as especially desirable and "memorable" pieces of the Elderly Instruments inventory. The guitars are sought after by musicians from the bluegrass and other genres. Werbin purchases some of the more valuable or interesting instruments for his personal collection, and has lent them to museums as temporary exhibits.Periodicals for the bluegrass genre such as Bluegrass Canada and Bluegrass Now have featured stories about Elderly and its selection of bluegrass instruments and repair services. Elderly employees maintain connections with the bluegrass industry by attending trade shows such as the International Bluegrass Association Trade Show in Louisville, Kentucky. At these shows, Elderly showcases typical bluegrass instruments, such as banjos, guitars, mandolins, fiddles and resophonic guitars, to musicians and businesspeople. Elderly Instruments staff members have set up organizations such as the "Friends of Bluegrass" to support local bluegrass musicians.Michigan Living magazine noted Elderly's liberal policy regarding the handling of instruments, something Werbin attributes to his difficulty shopping for Martin guitars in New York City in the 1960s. The magazine also notes that customers are encouraged to pick up and play any instrument, an unusual policy for a high-end instrument retailer. Impromptu "jam sessions" are frequent in the store, as customers try out guitars.
[EX A]: What is the name of the organization set up to support bluegrass musicians by the employees of the company that sold over 16,000 instruments in 2007?

[EX Q]: Passage: Article One, Section Eight of the United States Constitution grants the United States Congress "exclusive jurisdiction" over the city. The District did not have an elected local government until the passage of the 1973 Home Rule Act. The Act devolved certain Congressional powers to an elected mayor, currently Muriel Bowser, and the thirteen-member Council of the District of Columbia. However, Congress retains the right to review and overturn laws created by the council and intervene in local affairs.Each of the city's eight wards elects a single member of the council and residents elect four at-large members to represent the District as a whole. The council chair is also elected at-large. There are 37 Advisory Neighborhood Commissions (ANCs) elected by small neighborhood districts. ANCs can issue recommendations on all issues that affect residents; government agencies take their advice under careful consideration. The Attorney General of the District of Columbia, currently Karl Racine, is elected to a four-year term.Washington, D.C., observes all federal holidays and also celebrates Emancipation Day on April 16, which commemorates the end of slavery in the District. The flag of Washington, D.C., was adopted in 1938 and is a variation on George Washington's family coat of arms.Washington, D.C. is overwhelmingly Democratic, having voted for the Democratic candidate solidly since 1964. Each Republican candidate was voted down in favor of the Democratic candidate by a margin of at least 56 percentage points each time; the closest, albeit very large, margin between the two parties in a presidential election was in 1972, when Richard Nixon secured 21.6 percent of the vote to George McGovern's 78.1 percent. Since then, the Republican candidate has never received more than 20 percent of the vote.
Same-sex marriage has been legal in the District since 2010, and conversion therapy has been forbidden since 2015. Assisted suicide is also permitted in the district, with a bill legalizing the practice being introduced in 2015, signed by mayor Muriel Bowser in 2016 and going into effect in 2017, making Washington, D.C. the seventh jurisdiction in the United States to have legalized assisted suicide, along with Washington, Oregon, California, Colorado, Hawaii, Montana and Vermont.
Washington, D.C. has been a member state of the Unrepresented Nations and Peoples Organization (UNPO) since 2015.
[EX A]:
When was the last time a republican presidential candidate got over twenty percent vote in the city where the flag that was a variation of the first president's coat of arms was adopted?