Problem: Following the defeat in World War I, influence of German-speaking elites over Central and Eastern Europe was greatly limited. At the treaty of Versailles Germany was substantially reduced in size. Austria-Hungary was split up. Rump-Austria, which to a certain extent corresponded to the German-speaking areas of Austria-Hungary (a complete split into language groups was impossible due to multi-lingual areas and language-exclaves) adopted the name "German-Austria" (German: Deutschösterreich). The name German-Austria was forbidden by the victorious powers of World War I. Volga Germans living in the Soviet Union were interned in gulags or forcibly relocated during the Second World War.
What greatly reduced the size of Germany after WWI?
The answer is the following: treaty of Versailles

Problem: Nigeria regained democracy in 1999 when it elected Olusegun Obasanjo, the former military head of state, as the new President of Nigeria. This ended almost 33 years of military rule (from 1966 until 1999), excluding the short-lived second republic (between 1979 and 1983) by military dictators who seized power in coups d'état and counter-coups during the Nigerian military juntas of 1966–1979 and 1983–1998. Although the elections which brought Obasanjo to power in 1999 and again in 2003 were condemned as unfree and unfair, Nigeria has shown marked improvements in attempts to tackle government corruption and to hasten development.
How was the 2003 election regarded?
The answer is the following: unfree and unfair

Problem: The tour in March 1987[citation needed] of Knuckles, Jefferson, Fingers Inc. (Heard) and Adonis as the DJ International Tour boosted house in the UK. Following the number-one success of MARRS' "Pump Up The Volume" in October, the years 1987 to 1989 also saw UK acts such as The Beatmasters, Krush, Coldcut, Yazz, Bomb The Bass, S-Express, and Italy's Black Box opening the doors to a house music onslaught on the UK charts. Early British house music quickly set itself apart from the original Chicago house sound;[citation needed] many of the early hits were based on sample montage, rap was often used for vocals (far more than in the US),[citation needed] and humor was frequently an important element.
what was frequently an important element of UK house music?
The answer is the following: humor

Problem: Incandescent bulbs have been replaced in many applications by other types of electric light, such as fluorescent lamps, compact fluorescent lamps (CFL), cold cathode fluorescent lamps (CCFL), high-intensity discharge lamps, and light-emitting diode lamps (LED). Some jurisdictions, such as the European Union, China, Canada and United States, are in the process of phasing out the use of incandescent light bulbs while others, including Colombia, Mexico, Cuba, Argentina, Brazil and Australia, have prohibited them already.
What does the acronym CFL refer to?
The answer is the following:
compact fluorescent lamps