Q: Extract the answer to the question from the following context. Question: When copper is used as an allow in machinery, for which elements is it used? Context: The major applications of copper are in electrical wires (60%), roofing and plumbing (20%) and industrial machinery (15%). Copper is mostly used as a pure metal, but when a higher hardness is required it is combined with other elements to make an alloy (5% of total use) such as brass and bronze. A small part of copper supply is used in production of compounds for nutritional supplements and fungicides in agriculture. Machining of copper is possible, although it is usually necessary to use an alloy for intricate parts to get good machinability characteristics.
A: intricate parts

Q: Extract the answer to the question from the following context. Question: What entity tried to prevent the problem? Context: On Thursday, September 15, 2011, more than 500 people from Hongxiao Village protested over the large-scale death of fish in a nearby river. Angry protesters stormed the Zhejiang Jinko Solar Company factory compound, overturned eight company vehicles, and destroyed the offices before police came to disperse the crowd. Protests continued on the two following nights with reports of scuffles, officials said. Chen Hongming, a deputy head of Haining's environmental protection bureau, said the factory's waste disposal had failed pollution tests since April. The environmental watchdog had warned the factory, but it had not effectively controlled the pollution, Chen added.
A: police

Q: Extract the answer to the question from the following context. Question: What aspect of Washington University did the pressure groups' campaign threaten? Context: The process of desegregation at Washington University began in 1947 with the School of Medicine and the School of Social Work. During the mid and late 1940s, the University was the target of critical editorials in the local African American press, letter-writing campaigns by churches and the local Urban League, and legal briefs by the NAACP intended to strip its tax-exempt status. In spring 1949, a Washington University student group, the Student Committee for the Admission of Negroes (SCAN), began campaigning for full racial integration. In May 1952, the Board of Trustees passed a resolution desegregating the school's undergraduate divisions.
A: its tax-exempt status

Q: Extract the answer to the question from the following context. Question: Which paper uses the name of the people living in the state? Context: The Oklahoman is Oklahoma City's major daily newspaper and is the most widely circulated in the state. NewsOK.com is the Oklahoman's online presence. Oklahoma Gazette is Oklahoma City's independent newsweekly, featuring such staples as local commentary, feature stories, restaurant reviews and movie listings and music and entertainment. The Journal Record is the city's daily business newspaper and okcBIZ is a monthly publication that covers business news affecting those who live and work in Central Oklahoma.
A:
The Oklahoman