In this task, you're given a context passage. Your job is to generate relevant questions that can be answered by directly referring to the passage.

Kai had worked at the same company for 5 years. They decided that it was time to work hard to get a promotion.
Why did Kai do this?

In March 1943, DuPont began construction of a plutonium plant on a 112-acre (0.5 km2) site at Oak Ridge. Intended as a pilot plant for the larger production facilities at Hanford, it included the air-cooled X-10 Graphite Reactor, a chemical separation plant, and support facilities. Because of the subsequent decision to construct water-cooled reactors at Hanford, only the chemical separation plant operated as a true pilot. The X-10 Graphite Reactor consisted of a huge block of graphite, 24 feet (7.3 m) long on each side, weighing around 1,500 short tons (1,400 t), surrounded by 7 feet (2.1 m) of high-density concrete as a radiation shield.The greatest difficulty was encountered with the uranium slugs produced by Mallinckrodt and Metal Hydrides. These somehow had to be coated in aluminum to avoid corrosion and the escape of fission products into the cooling system. The Grasselli Chemical Company attempted to develop a hot dipping process without success. Meanwhile, Alcoa tried canning. A new process for flux-less welding was developed, and 97% of the cans passed a standard vacuum test, but high temperature tests indicated a failure rate of more than 50%. Nonetheless, production began in June 1943. The Metallurgical Laboratory eventually developed an improved welding technique with the help of General Electric, which was incorporated into the production process in October 1943.Watched by Fermi and Compton, the X-10 Graphite Reactor went critical on 4 November 1943 with about 30 short tons (27 t) of uranium. A week later the load was increased to 36 short tons (33 t), raising its power generation to 500 kW, and by the end of the month the first 500 mg of plutonium was created. Modifications over time raised the power to 4,000 kW in July 1944. X-10 operated as a production plant until January 1945, when it was turned over to research activities.
In what month was the first plutonium created?

The film opens with violinist Roberta Guaspari having been deserted by her US Navy husband and feeling devastated, almost suicidal. Encouraged by her mother, she attempts to rebuild her life and a friend from student days recommends her to the head teacher of a school in the tough New York City area of East Harlem. Despite a degree in music education, she has little experience in actual music teaching, but she's taken on as a substitute violin teacher. With a combination of toughness and determination, she inspires a group of kids, and their initially skeptical parents. The program slowly develops and attracts publicity. Ten years later, the string program is still running successfully at three schools, but suddenly the school budget is cut and Roberta is out of a job. Determined to fight the cuts, she enlists the support of former pupils, parents and teachers and plans a grand fund-raising concert, 'Fiddlefest', to raise money so that the program can continue. But with a few weeks to go and all participants furiously rehearsing, they lose the venue. Fortunately, the husband of a publicist friend is a violinist in the Guarneri Quartet, and he enlists the support of other well-known musicians, including Isaac Stern and Itzhak Perlman. They arrange for the concert to be mounted at Carnegie Hall. Other famous musicians, including Mark O'Connor, Michael Tree, Charles Veal Jr., Arnold Steinhardt, Karen Briggs, Sandra Park, Diane Monroe, and Joshua Bell, join in the performance, which is a resounding success. The film's end credits declare that the Opus 118 program is still running successfully. They also report that the school's funding was restored during the making of the film.
What instrument does Roberta Guaspari play?