TASK DEFINITION: This task is about reading the given passage and construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) its answer is a continuous text span from the paragraph. Avoid creating questions that (i) can be answered correctly without actually understanding the paragraph and (ii) uses same words or phrases given in the passage.
PROBLEM: In coniferous or softwood species the wood cells are mostly of one kind, tracheids, and as a result the material is much more uniform in structure than that of most hardwoods. There are no vessels ("pores") in coniferous wood such as one sees so prominently in oak and ash, for example.

SOLUTION: What type of cells makes up most wood cells in coniferous trees?

PROBLEM: In times past, until the 15th century, in Korea, Literary Chinese was the dominant form of written communication, prior to the creation of hangul, the Korean alphabet. Much of the vocabulary, especially in the realms of science and sociology, comes directly from Chinese, comparable to Latin or Greek root words in European languages. However, due to the lack of tones in Korean,[citation needed] as the words were imported from Chinese, many dissimilar characters took on identical sounds, and subsequently identical spelling in hangul.[citation needed] Chinese characters are sometimes used to this day for either clarification in a practical manner, or to give a distinguished appearance, as knowledge of Chinese characters is considered a high class attribute and an indispensable part of a classical education.[citation needed] It is also observed that the preference for Chinese characters is treated as being conservative and Confucian.

SOLUTION: What was the dominant form of written communication?

PROBLEM: Northwestern has roughly 225,000 alumni in all branches of business, government, law, science, education, medicine, media, and the performing arts. Among Northwestern's more notable alumni are U.S. Senator and presidential candidate George McGovern, Nobel Prize–winning economist George J. Stigler, Nobel Prize–winning novelist Saul Bellow, Pulitzer Prize–winning composer and diarist Ned Rorem, the much-decorated composer Howard Hanson, Deputy Prime Minister of Turkey Ali Babacan, the historian and novelist Wilma Dykeman, and the founder of the presidential prayer breakfast Abraham Vereide. U.S. Supreme Court Associate Justice John Paul Stevens, Supreme Court Justice and Ambassador to the United Nations Arthur Joseph Goldberg, and Governor of Illinois and Democratic presidential candidate Adlai Stevenson are among the graduates of the Northwestern School of Law. Many Northwestern alumni play or have played important roles in Chicago and Illinois, such as former Illinois governor and convicted felon Rod Blagojevich, Chicago Bulls and Chicago White Sox owner Jerry Reinsdorf, and theater director Mary Zimmerman. Northwestern alumnus David J. Skorton currently serves as president of Cornell University. Rahm Emanuel, the mayor of Chicago and former White House Chief of Staff, earned a Masters in Speech and Communication in 1985.

SOLUTION:
Which of Northwestern's alumni is notable for becoming a U.S. Senator and presidential candidate?