Problem: Central African Republic:

A new government was appointed on 31 March 2013, which consisted of members of Seleka and representatives of the opposition to Bozize, one pro-Bozize individual, and a number representatives of civil society. On 1 April, the former opposition parties declared that they would boycott the government. After African leaders in Chad refused to recognize Djotodia as President, proposing to form a transitional council and the holding of new elections, Djotodia signed a decree on 6 April for the formation of a council that would act as a transitional parliament. The council was tasked with electing a president to serve prior to elections in 18 months.

What did the former opposition parties declare?
---
A: boycott the government

Problem: Voicing of pre-vocalic initial voiceless alveolar fricatives occurs, although less in Dutch than in German (Du zeven, Germ sieben [z] vs. Eng seven and LG seven [s]), and also the shift in // > /d/. Dutch shares only with Low German the development of /xs/ > /ss/ (Du vossen, ossen and LG Vosse, Ossen vs. Germ Fuchse, Ochsen and Eng foxes, oxen), and also the development of /ft/ /xt/ though it is far more common in Dutch (Du zacht and LG sacht vs. Germ sanft and Eng soft, but Du kracht vs. LG/Germ kraft and Eng cognate craft).
Is the voicing of pre-vocalic initial voiceless alveolar fricatives more common in Dutch or German?
---
Answer: German

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Portugal's national energy transmission company, Redes Energeticas Nacionais (REN), uses sophisticated modeling to predict weather, especially wind patterns, and computer programs to calculate energy from the various renewable-energy plants. Before the solar/wind revolution, Portugal had generated electricity from hydropower plants on its rivers for decades. New programs combine wind and water: wind-driven turbines pump water uphill at night, the most blustery period; then the water flows downhill by day, generating electricity, when consumer demand is highest. Portugal's distribution system is also now a two-way street. Instead of just delivering electricity, it draws electricity from even the smallest generators, like rooftop solar panels. The government aggressively encouraged such contributions by setting a premium price for those who buy rooftop-generated solar electricity.
How did the Portuguese government encourage rooftop solar panels?
A: setting a premium price

Context and question: In the late 1980s, key breakthroughs in GaN epitaxial growth and p-type doping ushered in the modern era of GaN-based optoelectronic devices. Building upon this foundation, Dr. Moustakas at Boston University patented a method for producing high-brightness blue LEDs using a new two-step process. Two years later, in 1993, high-brightness blue LEDs were demonstrated again by Shuji Nakamura of Nichia Corporation using a gallium nitride growth process similar to Dr. Moustakas's. Both Dr. Moustakas and Mr. Nakamura were issued separate patents, which confused the issue of who was the original inventor (partly because although Dr. Moustakas invented his first, Dr. Nakamura filed first).[citation needed] This new development revolutionized LED lighting, making high-power blue light sources practical, leading to the development of technologies like BlueRay, as well as allowing the bright high resolution screens of modern tablets and phones.[citation needed]
In what decade were breakthroughs made that brought in the ancient era of GaN-based optoelectronic devices?
Answer: unanswerable

Question: As Western Europe witnessed the formation of new kingdoms, the Eastern Roman Empire remained intact and experienced an economic revival that lasted into the early 7th century. There were fewer invasions of the eastern section of the empire; most occurred in the Balkans. Peace with Persia, the traditional enemy of Rome, lasted throughout most of the 5th century. The Eastern Empire was marked by closer relations between the political state and Christian Church, with doctrinal matters assuming an importance in eastern politics that they did not have in Western Europe. Legal developments included the codification of Roman law; the first effortthe Theodosian Codewas completed in 438. Under Emperor Justinian (r. 527565), another compilation took placethe Corpus Juris Civilis. Justinian also oversaw the construction of the Hagia Sophia in Constantinople and the reconquest of North Africa from the Vandals and Italy from the Ostrogoths, under Belisarius (d. 565). The conquest of Italy was not complete, as a deadly outbreak of plague in 542 led to the rest of Justinian's reign concentrating on defensive measures rather than further conquests. At the emperor's death, the Byzantines had control of most of Italy, North Africa, and a small foothold in southern Spain. Justinian's reconquests have been criticised by historians for overextending his realm and setting the stage for the Muslim conquests, but many of the difficulties faced by Justinian's successors were due not just to over-taxation to pay for his wars but to the essentially civilian nature of the empire, which made raising troops difficult.
Is there an answer to this question: In what century did the economic revival in the Eastern Roman Empire end?

Answer: 7th

Historical aspects of the Expo line route are noteworthy. It uses the right-of-way for the Santa Monica Air Line that provided electric-powered freight and passenger service between Los Angeles and Santa Monica beginning in the 1920s. Service was discontinued in 1953 but diesel-powered freight deliveries to warehouses along the route continued until March 11, 1988. The abandonment of the line spurred concerns within the community and the entire right-of-way was purchased from Southern Pacific by Los Angeles Metropolitan Transportation Authority. The line was built in 1875 as the steam-powered Los Angeles and Independence Railroad to bring mining ore to ships in Santa Monica harbor and as a passenger excursion train to the beach.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): In what year was Santa Monica harbor built?
Ah, so..
unanswerable