Problem: Mexico City:

The National Autonomous University of Mexico (UNAM), located in Mexico City, is the largest university on the continent, with more than 300,000 students from all backgrounds. Three Nobel laureates, several Mexican entrepreneurs and most of Mexico's modern-day presidents are among its former students. UNAM conducts 50% of Mexico's scientific research and has presence all across the country with satellite campuses, observatories and research centres. UNAM ranked 74th in the Top 200 World University Ranking published by Times Higher Education (then called Times Higher Education Supplement) in 2006, making it the highest ranked Spanish-speaking university in the world. The sprawling main campus of the university, known as Ciudad Universitaria, was named a World Heritage Site by UNESCO in 2007.

What worldwide ranking does UNAM hold?
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A: 74th

Problem: The multiple churches that form the Anglican Communion and the Continuing Anglican movement have different views on Marian doctrines and venerative practices given that there is no single church with universal authority within the Communion and that the mother church (the Church of England) understands itself to be both "catholic" and "Reformed". Thus unlike the Protestant churches at large, the Anglican Communion (which includes the Episcopal Church in the United States) includes segments which still retain some veneration of Mary.
Which church is both "catholic" and "Reformed", but also Protestant?
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Answer: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Downtown Boston's streets grew organically, so they do not form a planned grid, unlike those in later-developed Back Bay, East Boston, the South End, and South Boston. Boston is the eastern terminus of I-90, which in Massachusetts runs along the Massachusetts Turnpike. The elevated portion of the Central Artery, which carried most of the through traffic in downtown Boston, was replaced with the O'Neill Tunnel during the Big Dig, substantially completed in early 2006.
The streets of Back bay grew into a what?
A: planned grid

Context and question: Thomas Barnes was appointed general editor in 1817. In the same year, the paper's printer James Lawson, died and passed the business onto his son John Joseph Lawson(18021852). Under the editorship of Barnes and his successor in 1841, John Thadeus Delane, the influence of The Times rose to great heights, especially in politics and amongst the City of London. Peter Fraser and Edward Sterling were two noted journalists, and gained for The Times the pompous/satirical nickname 'The Thunderer' (from "We thundered out the other day an article on social and political reform."). The increased circulation and influence of the paper was based in part to its early adoption of the steam-driven rotary printing press. Distribution via steam trains to rapidly growing concentrations of urban populations helped ensure the profitability of the paper and its growing influence.
What kind of printing press helped increase the circulation and influence of The Times back in 1817?
Answer: steam-driven rotary printing press

Question: The characteristic feature of angiosperms is the flower. Flowers show remarkable variation in form and elaboration, and provide the most trustworthy external characteristics for establishing relationships among angiosperm species. The function of the flower is to ensure fertilization of the ovule and development of fruit containing seeds. The floral apparatus may arise terminally on a shoot or from the axil of a leaf (where the petiole attaches to the stem). Occasionally, as in violets, a flower arises singly in the axil of an ordinary foliage-leaf. More typically, the flower-bearing portion of the plant is sharply distinguished from the foliage-bearing or vegetative portion, and forms a more or less elaborate branch-system called an inflorescence.
Is there an answer to this question: What do flowers provide the best external feature for doing?

Answer: establishing relationships among angiosperm species

Problem: Northwestern University:

Northwestern was founded in 1851 by John Evans, for whom the City of Evanston is named, and eight other lawyers, businessmen and Methodist leaders. Its founding purpose was to serve the Northwest Territory, an area that today includes the states of Ohio, Indiana, Illinois, Michigan, Wisconsin and parts of Minnesota. Instruction began in 1855; women were admitted in 1869. Today, the main campus is a 240-acre (97 ha) parcel in Evanston, along the shores of Lake Michigan just 12 miles north of downtown Chicago. The university's law, medical, and professional schools are located on a 25-acre (10 ha) campus in Chicago's Streeterville neighborhood. In 2008, the university opened a campus in Education City, Doha, Qatar with programs in journalism and communication.

When did instruction begin at Northwestern?
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A:
1855