Problem: Typical stringed instruments of the early period include the harp, lute, vielle, and psaltery, while wind instruments included the flute family (including recorder), shawm (an early member of the oboe family), trumpet, and the bagpipes. Simple pipe organs existed, but were largely confined to churches, although there were portable varieties. Later in the period, early versions of keyboard instruments like the clavichord and harpsichord began to appear. Stringed instruments such as the viol had emerged by the 16th century, as had a wider variety of brass and reed instruments. Printing enabled the standardization of descriptions and specifications of instruments, as well as instruction in their use.
What enabled descriptions and specification of instruments?
The answer is the following: Printing

The primary physiological cue for migration are the changes in the day length. These changes are also related to hormonal changes in the birds. In the period before migration, many birds display higher activity or Zugunruhe (German: migratory restlessness), first described by Johann Friedrich Naumann in 1795, as well as physiological changes such as increased fat deposition. The occurrence of Zugunruhe even in cage-raised birds with no environmental cues (e.g. shortening of day and falling temperature) has pointed to the role of circannual endogenous programs in controlling bird migrations. Caged birds display a preferential flight direction that corresponds with the migratory direction they would take in nature, changing their preferential direction at roughly the same time their wild conspecifics change course.
When do caged birds change their preferential direction?
the same time their wild conspecifics change course

Input: Copyright infringement
In 2007, the Institute for Policy Innovation (IPI) reported that music piracy took $12.5 billion from the U.S. economy. According to the study, musicians and those involved in the recording industry are not the only ones who experience losses attributed to music piracy. Retailers have lost over a billion dollars, while piracy has resulted in 46,000 fewer production-level jobs and almost 25,000 retail jobs. The U.S. government was also reported to suffer from music piracy, losing $422 million in tax revenue.

Who reported that piracy took $12.5 billion from the U.S. economy?
Output: Institute for Policy Innovation

Input: Article: The genocide was implemented in two phases: the wholesale killing of the able-bodied male population through massacre and subjection of army conscripts to forced labour, followed by the deportation of women, children, the elderly and infirm on death marches leading to the Syrian desert. Driven forward by military escorts, the deportees were deprived of food and water and subjected to periodic robbery, rape, and massacre. There was local Armenian resistance in the region, developed against the activities of the Ottoman Empire. The events of 1915 to 1917 are regarded by Armenians and the vast majority of Western historians to have been state-sponsored mass killings, or genocide.

Now answer this question: What do the Armenians see the events of 1915-1917 as?

Output: state-sponsored mass killings, or genocide

Article: Often taxonomists prefer to use phylogenetic analysis to determine whether a population can be considered a subspecies. Phylogenetic analysis relies on the concept of derived characteristics that are not shared between groups, usually applying to populations that are allopatric (geographically separated) and therefore discretely bounded. This would make a subspecies, evolutionarily speaking, a clade a group with a common evolutionary ancestor population. The smooth gradation of human genetic variation in general tends to rule out any idea that human population groups can be considered monophyletic (cleanly divided), as there appears to always have been considerable gene flow between human populations. Rachel Caspari (2003) have argued that clades are by definition monophyletic groups (a taxon that includes all descendants of a given ancestor) and since no groups currently regarded as races are monophyletic, none of those groups can be clades.

Question: What is a tongue twister of a word that merely means "cleanly divided"?
Ans: monophyletic

Input: Muammar Gaddafi
After Nasser died in November 1970, his successor, Anwar Sadat, suggested that rather than a unified state, they create a political federation, implemented in April 1971; in doing so, Egypt, Syria and Sudan got large grants of Libyan oil money. In February 1972, Gaddafi and Sadat signed an unofficial charter of merger, but it was never implemented as relations broke down the following year. Sadat became increasingly wary of Libya's radical direction, and the September 1973 deadline for implementing the Federation passed by with no action taken.

What was the alternative to creating an Arab political federation?
Output:
unified state