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A major turning point in the development of DC machines took place in 1864, when Antonio Pacinotti described for the first time the ring armature with its symmetrically grouped coils closed upon themselves and connected to the bars of a commutator, the brushes of which delivered practically non-fluctuating current. The first commercially successful DC motors followed the invention by Zenobe Gramme who, in 1871, reinvented Pacinotti's design. In 1873, Gramme showed that his dynamo could be used as a motor, which he demonstrated to great effect at exhibitions in Vienna and Philadelphia by connecting two such DC motors at a distance of up to 2 km away from each other, one as a generator. (See also 1873 : l'experience decisive [Decisive Workaround] .)
What made Pacinotti's motor an important advancement?
A: non-fluctuating current

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The 2011 Human Development Report was released on 2 November 2011, and calculated HDI values based on estimates for 2011. Below is the list of the "very high human development" countries (equal to the top quartile):
Which year was used for estimates in the 2012 report?
A: unanswerable

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The Turkish invasion, followed by occupation and the declaration of independence of the TRNC have been condemned by United Nations resolutions, which are reaffirmed by the Security Council every year. The last major effort to settle the Cyprus dispute was the Annan Plan in 2004, drafted by the then Secretary General, Kofi Annan. The plan was put to a referendum in both Northern Cyprus and the Republic of Cyprus. 65% of Turkish Cypriots voted in support of the plan and 74% Greek Cypriots voted against the plan, claiming that it disproportionately favoured the Turkish side. In total, 66.7% of the voters rejected the Annan Plan V. On 1 May 2004 Cyprus joined the European Union, together with nine other countries. Cyprus was accepted into the EU as a whole, although the EU legislation is suspended in the territory occupied by Turkey (TRNC), until a final settlement of the Cyprus problem. In July 2006, the island served as a haven for people fleeing Lebanon, due to the conflict between Israel and Hezbollah (also called "The July War").
In what year did Cyprus join the European Union?
A: 2004

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The greylag goose (Anser anser) was domesticated by the Egyptians at least 3000 years ago, and a different wild species, the swan goose (Anser cygnoides), domesticated in Siberia about a thousand years later, is known as a Chinese goose. The two hybridise with each other and the large knob at the base of the beak, a noticeable feature of the Chinese goose, is present to a varying extent in these hybrids. The hybrids are fertile and have resulted in several of the modern breeds. Despite their early domestication, geese have never gained the commercial importance of chickens and ducks.
When was the greylag goose first domesticated by humans?
A:
The greylag goose (Anser anser) was domesticated by the Egyptians at least 3000 years ago