Problem: Cardinal (Catholicism):

For a period ending in the mid-20th century, long-serving cardinal priests were entitled to fill vacancies that arose among the cardinal bishops, just as cardinal deacons of ten years' standing are still entitled to become cardinal priests. Since then, cardinals have been advanced to cardinal bishop exclusively by papal appointment.

What were long-serving cardinal priests entitled to do ending in the mid-fifteenth century?
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A: unanswerable

Problem: Iranian languages:

The other directly attested Old Iranian dialects are the two forms of Avestan, which take their name from their use in the Avesta, the liturgical texts of indigenous Iranian religion that now goes by the name of Zoroastrianism but in the Avesta itself is simply known as vohu daena (later: behdin). The language of the Avesta is subdivided into two dialects, conventionally known as "Old (or 'Gathic') Avestan", and "Younger Avestan". These terms, which date to the 19th century, are slightly misleading since 'Younger Avestan' is not only much younger than 'Old Avestan', but also from a different geographic region. The Old Avestan dialect is very archaic, and at roughly the same stage of development as Rigvedic Sanskrit. On the other hand, Younger Avestan is at about the same linguistic stage as Old Persian, but by virtue of its use as a sacred language retained its "old" characteristics long after the Old Iranian languages had yielded to their Middle Iranian stage. Unlike Old Persian, which has Middle Persian as its known successor, Avestan has no clearly identifiable Middle Iranian stage (the effect of Middle Iranian is indistinguishable from effects due to other causes).

What ancient religious document exists in two versions and includes Old Iranian language?
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A: Avestan

Problem: 2008 Sichuan earthquake:

The Zipingpu Hydropower Plant (simplified Chinese: ; traditional Chinese: ) located 20 km east of the epicenter was damaged. A recent inspection indicated that the damage was less severe than initially feared, and it remains structurally stable and safe. The Tulong reservoir upstream is in danger of collapse. About 2,000 troops have been allocated to Zipingpu, trying to release the pressure through spillway. In total, 391 dams, most of them small, were reported damaged by the quake.

How many dams were damaged?
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A: 391

Problem: Slavs:

The Slavic autonym is reconstructed in Proto-Slavic as *Slovenin, plural *Slovene. The oldest documents written in Old Church Slavonic and dating from the 9th century attest Slovene to describe the Slavs. Other early Slavic attestations include Old East Slavic Slovene for "an East Slavic group near Novgorod." However, the earliest written references to the Slavs under this name are in other languages. In the 6th century AD Procopius, writing in Byzantine Greek, refers to the Sklaboi, Sklabenoi, Sklauenoi, Sthlabenoi, or Sklabinoi, while his contemporary Jordanes refers to the Sclaveni in Latin.

Procopius' contemporary Jordanes referred to the Slavs in what language?
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A:
Latin