Input: USB
USB was designed to standardize the connection of computer peripherals (including keyboards, pointing devices, digital cameras, printers, portable media players, disk drives and network adapters) to personal computers, both to communicate and to supply electric power. It has become commonplace on other devices, such as smartphones, PDAs and video game consoles. USB has effectively replaced a variety of earlier interfaces, such as serial and parallel ports, as well as separate power chargers for portable devices.

What has USB effectively replaced?
Output: a variety of earlier interfaces

Input: Article: In the mid-16th century, "botanical gardens" were founded in a number of Italian universities the Padua botanical garden in 1545 is usually considered to be the first which is still in its original location. These gardens continued the practical value of earlier "physic gardens", often associated with monasteries, in which plants were cultivated for medical use. They supported the growth of botany as an academic subject. Lectures were given about the plants grown in the gardens and their medical uses demonstrated. Botanical gardens came much later to northern Europe; the first in England was the University of Oxford Botanic Garden in 1621. Throughout this period, botany remained firmly subordinate to medicine.

Now answer this question: What was the first botanical garden at an Italian university?

Output: Padua

Article: Other Christian denominations on the island include: Roman Catholic (since 1852), Salvation Army (since 1884), Baptist (since 1845) and, in more recent times, Seventh-day Adventist (since 1949), New Apostolic and Jehovah's Witnesses (of which one in 35 residents is a member, the highest ratio of any country). The Catholics are pastorally served by the Mission sui iuris of Saint Helena, Ascension and Tristan da Cunha, whose office of ecclesiastical superior is vested in the Apostolic Prefecture of the Falkland Islands.

Question: How many Johovah's Witnesses were on the island?
Ans: 35

Here is a question about this article: In 1978, Hayek came into conflict with the Liberal Party leader, David Steel, who claimed that liberty was possible only with "social justice and an equitable distribution of wealth and power, which in turn require a degree of active government intervention" and that the Conservative Party were more concerned with the connection between liberty and private enterprise than between liberty and democracy. Hayek claimed that a limited democracy might be better than other forms of limited government at protecting liberty but that an unlimited democracy was worse than other forms of unlimited government because "its government loses the power even to do what it thinks right if any group on which its majority depends thinks otherwise".
What is the answer to this question: Which party was criticized for being less concerned about liberty and democracy?
****
So... the Conservative Party

The problem: Answer a question about this article:
Brass, which is an alloy of copper and zinc, has been used since at least the 10th century BC in Judea and by the 7th century BC in Ancient Greece. Zinc metal was not produced on a large scale until the 12th century in India and was unknown to Europe until the end of the 16th century. The mines of Rajasthan have given definite evidence of zinc production going back to the 6th century BC. To date, the oldest evidence of pure zinc comes from Zawar, in Rajasthan, as early as the 9th century AD when a distillation process was employed to make pure zinc. Alchemists burned zinc in air to form what they called "philosopher's wool" or "white snow".
When was zinc introduced to Europe?
****
The answer: end of the 16th century

The problem: Answer a question about this article:
To feel or see the difference between aspirated and unaspirated sounds, one can put a hand or a lit candle in front of one's mouth, and say pin [pn] and then spin [spn]. One should either feel a puff of air or see a flicker of the candle flame with pin that one does not get with spin. In most dialects of English, the initial consonant is aspirated in pin and unaspirated in spin.
With what word should you see a candle flicker or feel a puff of air?
****
The answer:
pin