Simultaneous videoconferencing among three or more remote points is possible by means of a Multipoint Control Unit (MCU). This is a bridge that interconnects calls from several sources (in a similar way to the audio conference call). All parties call the MCU, or the MCU can also call the parties which are going to participate, in sequence. There are MCU bridges for IP and ISDN-based videoconferencing. There are MCUs which are pure software, and others which are a combination of hardware and software. An MCU is characterised according to the number of simultaneous calls it can handle, its ability to conduct transposing of data rates and protocols, and features such as Continuous Presence, in which multiple parties can be seen on-screen at once. MCUs can be stand-alone hardware devices, or they can be embedded into dedicated videoconferencing units.
What feature enables an MCU to allow for multiple parties to be seen on screen at the same time?
Continuous Presence

Input: Mexico City
In response to the demands, in 1987 the Federal District received a greater degree of autonomy, with the elaboration the first Statute of Government (Estatuto de Gobierno), and the creation of an Assembly of Representatives.[citation needed] In the 1990s, this autonomy was further expanded and, starting from 1997, residents can directly elect the head of government of the Federal District and the representatives of a unicameral Legislative Assembly (which succeeded the previous Assembly) by popular vote.

When did citizens receive the right to elect the head of the Federal District?
Output: 1997

Input: Article: Several companies, refusing to pay the licensing fee or having been rejected by Nintendo, found ways to circumvent the console's authentication system. Most of these companies created circuits that used a voltage spike to temporarily disable the 10NES chip in the NES. A few unlicensed games released in Europe and Australia came in the form of a dongle that would be connected to a licensed game, in order to use the licensed game's 10NES chip for authentication. In order to combat unlicensed games, Nintendo of America threatened retailers who sold them with losing their supply of licensed titles. In addition, multiple revisions were made to the NES PCBs to prevent these games from working.

Now answer this question: Why did the companies circumvent the authentication system?

Output: refusing to pay the licensing fee or having been rejected by Nintendo

Article: The Iranian languages or Iranic languages form a branch of the Indo-Iranian languages, which in turn are a branch of the Indo-European language family. The speakers of Iranian languages are known as Iranian peoples. Historical Iranian languages are grouped in three stages: Old Iranian (until 400 BCE), Middle Iranian (400 BCE 900 CE), and New Iranian (since 900 CE). Of the Old Iranian languages, the better understood and recorded ones are Old Persian (a language of Achaemenid Iran) and Avestan (the language of the Avesta). Middle Iranian languages included Middle Persian (a language of Sassanid Iran), Parthian, and Bactrian.

Question: What is another term meaning Iranian languages?
Ans: Iranic languages

Here is a question about this article: In India, the British retained the Northern Circars, but returned all the French trading ports. The treaty, however, required that the fortifications of these settlements be destroyed and never rebuilt, while only minimal garrisons could be maintained there, thus rendering them worthless as military bases. Combined with the loss of France's ally in Bengal and the defection of Hyderabad to the British as a result of the war, this effectively brought French power in India to an end, making way for British hegemony and eventual control of the subcontinent.
What is the answer to this question: What did France retain in India?
****
So... returned all the French trading ports

Article: The western section of the state is part of the Appalachian Mountain range. Among the subranges of the Appalachians located in the state are the Great Smoky Mountains, Blue Ridge Mountains, Great Balsam Mountains, and Black Mountains. The Black Mountains are the highest in the eastern United States, and culminate in Mount Mitchell at 6,684 feet (2,037 m) the highest point east of the Mississippi River. Although agriculture still remains important, tourism has become a dominant industry in the mountains. Growing Christmas trees has recently become an important industry as well. Because of the higher altitude, the climate in the mountains often differs markedly from that of the rest of the state. Winter in western North Carolina typically features high snowfall and subfreezing temperatures more akin to those of a midwestern state than of a southern state.

Question: What is the name of the highest point east of the Mississippi river?
Ans:
Mount Mitchell