Problem: Railway electrification system:

3 kV DC is used in Belgium, Italy, Spain, Poland, the northern Czech Republic, Slovakia, Slovenia, South Africa, Chile, and former Soviet Union countries (also using 25 kV 50 Hz AC). It was formerly used by the Milwaukee Road from Harlowton, Montana to Seattle-Tacoma, across the Continental Divide and including extensive branch and loop lines in Montana, and by the Delaware, Lackawanna & Western Railroad (now New Jersey Transit, converted to 25 kV AC) in the United States, and the Kolkata suburban railway (Bardhaman Main Line) in India, before it was converted to 25 kV 50 Hz AC.

What is used by the current Soviet Union countries?
---
A: unanswerable

Problem: BeiDou-2 (formerly known as COMPASS) is not an extension to the older BeiDou-1, but rather supersedes it outright. The new system will be a constellation of 35 satellites, which include 5 geostationary orbit satellites for backward compatibility with BeiDou-1, and 30 non-geostationary satellites (27 in medium Earth orbit and 3 in inclined geosynchronous orbit), that will offer complete coverage of the globe.
How may satellites will the BeiDou-2 system have?
---
Answer: 35

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
There are very few existing mosaics from the Komnenian period but this paucity must be due to accidents of survival and gives a misleading impression. The only surviving 12th-century mosaic work in Constantinople is a panel in Hagia Sophia depicting Emperor John II and Empress Eirene with the Theotokos (112234). The empress with her long braided hair and rosy cheeks is especially capturing. It must be a lifelike portrayal because Eirene was really a redhead as her original Hungarian name, Piroska shows. The adjacent portrait of Emperor Alexios I Komnenos on a pier (from 1122) is similarly personal. The imperial mausoleum of the Komnenos dynasty, the Pantokrator Monastery was certainly decorated with great mosaics but these were later destroyed. The lack of Komnenian mosaics outside the capital is even more apparent. There is only a "Communion of the Apostles" in the apse of the cathedral of Serres.
What deity does the 12th century mosaic in the Hagia Sophia depict?
A: the Theotokos

Context and question: Antarctica (US English i/ntrktk/, UK English /ntktk/ or /nttk/ or /ntk/)[Note 1] is Earth's southernmost continent, containing the geographic South Pole. It is situated in the Antarctic region of the Southern Hemisphere, almost entirely south of the Antarctic Circle, and is surrounded by the Southern Ocean. At 14,000,000 square kilometres (5,400,000 square miles), it is the fifth-largest continent in area after Asia, Africa, North America, and South America. For comparison, Antarctica is nearly twice the size of Australia. About 98% of Antarctica is covered by ice that averages 1.9 km (1.2 mi; 6,200 ft) in thickness, which extends to all but the northernmost reaches of the Antarctic Peninsula.
What continents is Antarctica larger than?
Answer: unanswerable

Question: In early modern times, cardinals often had important roles in secular affairs. In some cases, they took on powerful positions in government. In Henry VIII's England, his chief minister was Cardinal Wolsey. Cardinal Richelieu's power was so great that he was for many years effectively the ruler of France. Richelieu successor was also a cardinal, Jules Mazarin. Guillaume Dubois and Andre-Hercule de Fleury complete the list of the "four great" cardinals to have ruled France.[citation needed] In Portugal, due to a succession crisis, one cardinal, Henry, King of Portugal, was crowned king, the only example of a cardinal-king.
Is there an answer to this question: What role did priests have in secular affairs?

Answer: unanswerable

Question: Cyprus has two official languages, Greek and Turkish. Armenian and Cypriot Maronite Arabic are recognised as minority languages. Although without official status, English is widely spoken and it features widely on road signs, public notices, and in advertisements, etc. English was the sole official language during British colonial rule and the lingua franca until 1960, and continued to be used (de facto) in courts of law until 1989 and in legislation until 1996. 80.4% of Cypriots are proficient in the English language as a second language. Russian is widely spoken among the country's minorities, residents and citizens of post-Soviet countries, and Pontic Greeks. Russian, after English and Greek, is the third language used on many signs of shops and restaurants, particularly in Limassol and Paphos. In addition to these languages, 12% speak French and 5% speak German.
Is there an answer to this question: Are there any Eastern languages spoken in Cyprus?

Answer:
Russian