Input: Phonology
Since the early 1960s, theoretical linguists have moved away from the traditional concept of a phoneme, preferring to consider basic units at a more abstract level, as a component of morphemes; these units can be called morphophonemes, and analysis using this approach is called morphophonology.

On what level do theoretical linguists consider basic units?
Output: abstract

Input: Article: The Battle of Osan, the first significant American engagement of the Korean War, involved the 540-soldier Task Force Smith, which was a small forward element of the 24th Infantry Division which had been flown in from Japan. On 5 July 1950, Task Force Smith attacked the North Koreans at Osan but without weapons capable of destroying the North Koreans' tanks. They were unsuccessful; the result was 180 dead, wounded, or taken prisoner. The KPA progressed southwards, pushing back the US force at Pyongtaek, Chonan, and Chochiwon, forcing the 24th Division's retreat to Taejeon, which the KPA captured in the Battle of Taejon; the 24th Division suffered 3,602 dead and wounded and 2,962 captured, including the Division's Commander, Major General William F. Dean.

Now answer this question: Where was the 24th Division forced to retreat to what location?

Output: Taejeon

Article: As Edward was unmarried and had no children, Albert was the heir presumptive to the throne. Less than a year later, on 11 December 1936, Edward VIII abdicated in order to marry his mistress, Wallis Simpson, who was divorced from her first husband and divorcing her second. Edward had been advised by British Prime Minister Stanley Baldwin that he could not remain king and marry a divorced woman with two living ex-husbands. Edward chose abdication in preference to abandoning his marriage plans. Thus Albert became king, a position he was reluctant to accept. The day before the abdication, he went to London to see his mother, Queen Mary. He wrote in his diary, "When I told her what had happened, I broke down and sobbed like a child."

Question: Who is Edward's mother?
Ans: Queen Mary

Here is a question about this article: At the end of the Second Anglo-Dutch War, the English gained New Amsterdam (New York) in North America in exchange for Dutch control of Run, an Indonesian island. Several intertribal wars among the Native Americans and some epidemics brought on by contact with the Europeans caused sizable population losses for the Lenape between the years 1660 and 1670. By 1700, the Lenape population had diminished to 200.
What is the answer to this question: What was the name of the island the English traded to the Dutch in return for New Amsterdam?
****
So... Run

The problem: Answer a question about this article:
The Umayyad Caliphate (Arabic: , trans. Al-Khilafat al-umawiyya) was the second of the four major Islamic caliphates established after the death of Muhammad. This caliphate was centered on the Umayyad dynasty (Arabic: , al-Umawiyyun, or , Banu Umayya, "Sons of Umayya"), hailing from Mecca. The Umayyad family had first come to power under the third caliph, Uthman ibn Affan (r. 644656), but the Umayyad regime was founded by Muawiya ibn Abi Sufyan, long-time governor of Syria, after the end of the First Muslim Civil War in 661 CE/41 AH. Syria remained the Umayyads' main power base thereafter, and Damascus was their capital. The Umayyads continued the Muslim conquests, incorporating the Caucasus, Transoxiana, Sindh, the Maghreb and the Iberian Peninsula (Al-Andalus) into the Muslim world. At its greatest extent, the Umayyad Caliphate covered 15 million km2 (5.79 million square miles), making it the largest empire (in terms of area - not in terms of population) the world had yet seen, and the fifth largest ever to exist.
How many major Islamic caliphates existed after Muhammad's death?
****
The answer: four

The problem: Answer a question about this article:
William Henry Perkin studied and worked at the college under von Hofmann, but resigned his position after discovering the first synthetic dye, mauveine, in 1856. Perkin's discovery was prompted by his work with von Hofmann on the substance aniline, derived from coal tar, and it was this breakthrough which sparked the synthetic dye industry, a boom which some historians have labelled the second chemical revolution. His contribution led to the creation of the Perkin Medal, an award given annually by the Society of Chemical Industry to a scientist residing in the United States for an "innovation in applied chemistry resulting in outstanding commercial development". It is considered the highest honour given in the industrial chemical industry.
The discovery of the synthetic dye is claimed by some histories to have sparked what event?
****
The answer:
second chemical revolution