Question: Shen Kuo (Chinese: Chen Gua ; 1031-1095), courtesy name Cunzhong (Cun Zhong ) and pseudonym Mengqi (now usually given as Mengxi) Weng (Meng Xi Weng ), was a Han Chinese polymathic scientist and statesman of the Song dynasty (960-1279). Excelling in many fields of study and statecraft, he was a mathematician, astronomer, meteorologist, geologist, zoologist, botanist, pharmacologist, agronomist, archaeologist, ethnographer, cartographer, encyclopedist, general, diplomat, hydraulic engineer, inventor, academy chancellor, finance minister, governmental state inspector, poet, and musician.

Since the time of the engineer and inventor Ma Jun (c. 200-265), the Chinese had used the south-pointing chariot, which did not employ magnetism, as a compass. In 1044 the Collection of the Most Important Military Techniques (Wu Jing Zong Yao ; Wujing Zongyao) recorded that fish-shaped objects cut from sheet iron, magnetized by thermoremanence (essentially, heating that produced weak magnetic force), and placed in a water-filled bowl enclosed by a box were used for directional pathfinding alongside the south-pointing chariot.  However, it was not until the time of Shen Kuo that the earliest magnetic compasses would be used for navigation. In his written work, Shen Kuo made the first known explicit reference to the magnetic compass-needle and the concept of true north. He wrote that steel needles were magnetized once they were rubbed with lodestone, and that they were put in floating position or in mountings; he described the suspended compass as the best form to be used, and noted that the magnetic needle of compasses pointed either south or north. Shen Kuo asserted that the needle will point south but with a deviation, stating "[the magnetic needles] are always displaced slightly east rather than pointing due south."  Shen Kuo wrote that it was preferable to use the twenty-four-point rose instead of the old eight compass cardinal points -- and the former was recorded in use for navigation shortly after Shen's death. The preference of use for the twenty-four-point-rose compass may have arisen from Shen's finding of a more accurate astronomical meridian, determined by his measurement between the pole star and true north; however, it could also have been inspired by geomantic beliefs and practices. The book of the author Zhu Yu, the Pingzhou Table Talks published in 1119 (written from 1111 to 1117), was the first record of use of a compass for seafaring navigation. However, Zhu Yu's book recounts events back to 1086, when Shen Kuo was writing the Dream Pool Essays; this meant that in Shen's time the compass might have already been in navigational use. In any case, Shen Kuo's writing on magnetic compasses has proved invaluable for understanding China's earliest use of the compass for seafaring navigation.

Using a quote from the above article, answer the following question: What else did he say about the magnetic compasses?
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Answer: He wrote that steel needles were magnetized once they were rubbed with lodestone,

Problem: David Howell Evans was born at the Barking Maternity Hospital, in the county of Essex in England, on 8 August 1961. He is the second child of Welsh parents Garvin and Gwenda Evans, who originated in Llanelli, a coastal town in South Wales. Garvin was an engineer who worked for the local electricity board, and then took a job with the electronics company Plessey. The Edge has an elder brother Richard (often called Dik) and a younger sister called Gillian.

Whilst the Evans brothers were at Mount Temple Comprehensive School in Dublin in 1976, they went along to a meeting in response to an advert posted by another pupil, Larry Mullen Jr., on the school's noticeboard seeking musicians to form a new band with him. Among the several other pupils who also responded to the note were Paul Hewson and Adam Clayton. The band went through a number of reformations before becoming known as U2 in March 1978 (Richard Evans having left before this to join another band, leaving his younger brother as the lead guitarist).  Early in the band's career, Evans was given the name 'The Edge' by Bono. According to fan site atU2.com, "The nickname was inspired in the beginning by the sharp features of his face, but it also applied to his sharp mind and the way he always observed things from the edge." However, the origin of the name is disputed and other theories include a description of his guitar playing and his preference for not becoming fully involved and therefore remaining on the edge of things.  U2 began its public performance life in small venues in Dublin in 1977, occasionally playing at other venues elsewhere in Ireland. In December 1979 they performed their first concerts outside Ireland, in London, and in 1980 began extensive touring across the British Isles, developing a following. Their debut album Boy was released in 1980.  In 1981, leading up to the October Tour, Evans came very close to leaving U2 for religious reasons, but he decided to stay. During this period he became involved with a group called Shalom Tigers, in which bandmates Bono and Larry Mullen Jr. were also involved. Shortly after deciding to remain with the band, he wrote a piece of music that later became "Sunday Bloody Sunday".

What reformations were made?

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Problem: David Gaub McCullough (; born July 7, 1933) is an American author, narrator, historian, and lecturer. He is a two-time winner of the Pulitzer Prize and the National Book Award and a recipient of the Presidential Medal of Freedom, the United States' highest civilian award. Born and raised in Pittsburgh, McCullough earned a degree in English literature from Yale University.

McCullough was born in the Point Breeze neighborhood of Pittsburgh, Pennsylvania, the son of Ruth (nee Rankin) and Christian Hax McCullough. He is of Scots-Irish descent. He was educated at Linden Avenue Grade School and Shady Side Academy, in his hometown of Pittsburgh. One of four sons, McCullough had a "marvelous" childhood with a wide range of interests, including sports and drawing cartoons. McCullough's parents and his grandmother, who read to him often, introduced him to books at an early age. His parents often talked about history, a topic he says should be discussed more often. McCullough "loved school, every day"; he contemplated many career choices, ranging from architect, actor, painter, writer, to lawyer, and contemplated attending medical school for a time.  In 1951, McCullough began attending Yale University. He said that it was a "privilege" to study English at Yale because of faculty members such as John O'Hara, John Hersey, Robert Penn Warren, and Brendan Gill. McCullough occasionally ate lunch with the Pulitzer Prize-winning novelist and playwright Thornton Wilder. Wilder, says McCullough, taught him that a competent writer maintains "an air of freedom" in the storyline, so that a reader will not anticipate the outcome, even if the book is non-fiction.  While at Yale, he became a member of Skull and Bones. He served apprenticeships at Time, Life, the United States Information Agency, and American Heritage, where he enjoyed research. "Once I discovered the endless fascination of doing the research and of doing the writing, I knew I had found what I wanted to do in my life." While attending Yale, McCullough studied Arts and earned his bachelor's degree in English, with the intention of becoming a fiction writer or playwright. He graduated with honors in English literature (1955).

What was there next choice

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McCullough's parents and his grandmother, who read to him often, introduced him to books at an early age.