Problem: Christian:

The region of modern Eastern Europe and Central Eurasia (Russia, Ukraine and other countries of the ex-USSR) have a long history of Christianity and Christian communities on its lands. In ancient times, in the first centuries after the birth of Christ, when this region was called[by whom?] Scythia - Christians already lived there. Later the region saw the first states to adopt Christianity officially - initially in Armenia (301 AD) and in Georgia (337 AD), later in the Great Russian Principality (Kyivan Rus, Russian: Великое княжество Русское, ca 988 AD). People of that time used to denote themselves Christians (христиане, крестьяне) and Russians (русские). Both terms had strong Christian connotations.[citation needed] It is also interesting that in time the term "крестьяне" acquired the meaning "peasants of Christian faith" and later "peasants" (the main part of the population of the region), while the term "христиане" retained its religious meaning and the term "русские" began to mean representatives of the heterogeneous Russian nation formed on the basis of common Christian faith and language,[citation needed] which strongly influenced the history and development of the region. In the region the "Pravoslav faith" (православная вера - Orthodox faith) or "Russian faith" (русская вера) from earliest times became almost as known as the original "Christian faith" (христианская, крестьянская вера). Also in some contexts the term "cossack" (козак, казак - free man by the will of God) was used[by whom?] to denote "free" Christians of steppe origin and Russian language.

In 337 AD which state became the first to adopt Christianity?
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A: unanswerable


Problem: Gregorian calendar:

The calendar was a refinement to the Julian calendar amounting to a 0.002% correction in the length of the year. The motivation for the reform was to bring the date for the celebration of Easter to the time of the year in which it was celebrated when it was introduced by the early Church. Because the celebration of Easter was tied to the spring equinox, the Roman Catholic Church considered the steady drift in the date of Easter caused by the year being slightly too long to be undesirable. The reform was adopted initially by the Catholic countries of Europe. Protestants and Eastern Orthodox countries continued to use the traditional Julian calendar and adopted the Gregorian reform after a time, for the sake of convenience in international trade. The last European country to adopt the reform was Greece, in 1923.

What was the correction due to?
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A: length of the year


Problem: Sumer:

The Sumerians were a non-Semitic caucasoid people, and spoke a language isolate; a number of linguists believed they could detect a substrate language beneath Sumerian, because names of some of Sumer's major cities are not Sumerian, revealing influences of earlier inhabitants. However, the archaeological record shows clear uninterrupted cultural continuity from the time of the early Ubaid period (5300 – 4700 BC C-14) settlements in southern Mesopotamia. The Sumerian people who settled here farmed the lands in this region that were made fertile by silt deposited by the Tigris and the Euphrates rivers.

Where did people fish in the Ubaid period?
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A: unanswerable


Problem: High-definition television:

Several systems were proposed as the new standard for the US, including the Japanese MUSE system, but all were rejected by the FCC because of their higher bandwidth requirements. At this time, the number of television channels was growing rapidly and bandwidth was already a problem. A new standard had to be more efficient, needing less bandwidth for HDTV than the existing NTSC.

 What was decreasing and consuming a lot of bandwidth?
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A:
unanswerable