Input: Alexander Graham Bell
Bell believed the photophone's principles were his life's "greatest achievement", telling a reporter shortly before his death that the photophone was "the greatest invention [I have] ever made, greater than the telephone". The photophone was a precursor to the fiber-optic communication systems which achieved popular worldwide usage in the 1980s. Its master patent was issued in December 1880, many decades before the photophone's principles came into popular use.

In what decade did fiber-optics become widely used?
Output: 1980s

Input: Article: Throughout the 14th century, French kings sought to expand their influence at the expense of the territorial holdings of the nobility. They ran into difficulties when attempting to confiscate the holdings of the English kings in southern France, leading to the Hundred Years' War, waged from 1337 to 1453. Early in the war the English under Edward III (r. 132777) and his son Edward, the Black Prince (d. 1376),[AF] won the battles of Crecy and Poitiers, captured the city of Calais, and won control of much of France.[AG] The resulting stresses almost caused the disintegration of the French kingdom during the early years of the war. In the early 15th century, France again came close to dissolving, but in the late 1420s the military successes of Joan of Arc (d. 1431) led to the victory of the French and the capture of the last English possessions in southern France in 1453. The price was high, as the population of France at the end of the Wars was likely half what it had been at the start of the conflict. Conversely, the Wars had a positive effect on English national identity, doing much to fuse the various local identities into a national English ideal. The conflict with France also helped create a national culture in England separate from French culture, which had previously been the dominant influence. The dominance of the English longbow began during early stages of the Hundred Years' War, and cannon appeared on the battlefield at Crecy in 1346.

Now answer this question: Along with Poitiers, what was the site of a notable victory by Edward III's England over the French?

Output: Crecy

Article: London is a leading global city, with strengths in the arts, commerce, education, entertainment, fashion, finance, healthcare, media, professional services, research and development, tourism, and transport all contributing to its prominence. It is one of the world's leading financial centres and has the fifth-or sixth-largest metropolitan area GDP in the world depending on measurement.[note 3] London is a world cultural capital. It is the world's most-visited city as measured by international arrivals and has the world's largest city airport system measured by passenger traffic. London is one of the world's leading investment destinations, hosting more international retailers and ultra high-net-worth individuals than any other city. London's 43 universities form the largest concentration of higher education institutes in Europe, and a 2014 report placed it first in the world university rankings. According to the report London also ranks first in the world in software, multimedia development and design, and shares first position in technology readiness. In 2012, London became the first city to host the modern Summer Olympic Games three times.

Question: Where does London rank in terms of metropolitan area GDP?
Ans: fifth-or sixth-largest

Here is a question about this article: On April 23, 2008, against the Colorado Rockies, the Cubs recorded the 10,000th regular-season win in their franchise's history dating back to the beginning of the National League in 1876. The Cubs reached the milestone with an overall National League record of 10,000-9,465. Chicago was only the second club in Major League Baseball history to attain this milestone, the first having been the San Francisco Giants in mid-season 2005. The Cubs, however, hold the mark for victories for a team in a single city. The Chicago club's 7777 record in the National Association (1871, 18741875) is not included in MLB record keeping. Post-season series are also not included in the totals. To honor the milestone, the Cubs flew an extra white flag displaying "10,000" in blue, along with the customary "W" flag.
What is the answer to this question: Who did the Cubs record their 10,000 regular-season against?
****
So... Colorado Rockies

The problem: Answer a question about this article:
In 1799, English Freemasonry almost came to a halt due to Parliamentary proclamation. In the wake of the French Revolution, the Unlawful Societies Act 1799 banned any meetings of groups that required their members to take an oath or obligation. The Grand Masters of both the Moderns and the Antients Grand Lodges called on Prime Minister William Pitt (who was not a Freemason) and explained to him that Freemasonry was a supporter of the law and lawfully constituted authority and was much involved in charitable work. As a result, Freemasonry was specifically exempted from the terms of the Act, provided that each private lodge's Secretary placed with the local "Clerk of the Peace" a list of the members of his lodge once a year. This continued until 1967 when the obligation of the provision was rescinded by Parliament.
When was the Unlawful Socities Act implemented?
****
The answer: 1799

The problem: Answer a question about this article:
Encompassing a wide variety of post-Romantic styles composed through the year 2000, 20th century classical music includes late romantic, modern, high-modern, and postmodern styles of composition. Modernism (18901930) marked an era when many composers rejected certain values of the common practice period, such as traditional tonality, melody, instrumentation, and structure. The high-modern era saw the emergence of neo-classical and serial music. A few authorities have claimed high-modernism as the beginning of postmodern music from about 1930. Others have more or less equated postmodern music with the "contemporary music" composed from the late 20th century through to the early 21st century.
Postmodern music is also know as what?
****
The answer:
contemporary music