The Neapolitan style has an almond-shaped body resembling a bowl, constructed from curved strips of wood. It usually has a bent sound table, canted in two planes with the design to take the tension of the 8 metal strings arranged in four courses. A hardwood fingerboard sits on top of or is flush with the sound table. Very old instruments may use wooden tuning pegs, while newer instruments tend to use geared metal tuners. The bridge is a movable length of hardwood. A pickguard is glued below the sound hole under the strings. European roundbacks commonly use a 13-inch scale instead of the 13.876 common on archtop Mandolins.
How many strings does the Neapolitan mandolin have?
8

Input: Textual criticism
When comparing different documents, or "witnesses", of a single, original text, the observed differences are called variant readings, or simply variants or readings. It is not always apparent which single variant represents the author's original work. The process of textual criticism seeks to explain how each variant may have entered the text, either by accident (duplication or omission) or intention (harmonization or censorship), as scribes or supervisors transmitted the original author's text by copying it. The textual critic's task, therefore, is to sort through the variants, eliminating those most likely to be un-original, hence establishing a "critical text", or critical edition, that is intended to best approximate the original. At the same time, the critical text should document variant readings, so the relation of extant witnesses to the reconstructed original is apparent to a reader of the critical edition. In establishing the critical text, the textual critic considers both "external" evidence (the age, provenance, and affiliation of each witness) and "internal" or "physical" considerations (what the author and scribes, or printers, were likely to have done).

Why is it important to document variations in witness texts when compiling a critical text?
Output: so the relation of extant witnesses to the reconstructed original is apparent to a reader of the critical edition.

Input: Article: Peace between England and the Netherlands in 1688 meant that the two countries entered the Nine Years' War as allies, but the conflictwaged in Europe and overseas between France, Spain and the Anglo-Dutch allianceleft the English a stronger colonial power than the Dutch, who were forced to devote a larger proportion of their military budget on the costly land war in Europe. The 18th century saw England (after 1707, Britain) rise to be the world's dominant colonial power, and France becoming its main rival on the imperial stage.

Now answer this question: In which century did Britain become the world's dominant colonial power?

Output: 18th

Article: The Times commissioned the serif typeface Times New Roman, created by Victor Lardent at the English branch of Monotype, in 1931. It was commissioned after Stanley Morison had written an article criticizing The Times for being badly printed and typographically antiquated. The font was supervised by Morison and drawn by Victor Lardent, an artist from the advertising department of The Times. Morison used an older font named Plantin as the basis for his design, but made revisions for legibility and economy of space. Times New Roman made its debut in the issue of 3 October 1932. After one year, the design was released for commercial sale. The Times stayed with Times New Roman for 40 years, but new production techniques and the format change from broadsheet to tabloid in 2004 have caused the newspaper to switch font five times since 1972. However, all the new fonts have been variants of the original New Roman font:

Question: Who commissioned the change of the typeface of The Times in 1931?
Ans: Stanley Morison

Here is a question about this article: In quantum mechanics, energy is defined in terms of the energy operator as a time derivative of the wave function. The Schrodinger equation equates the energy operator to the full energy of a particle or a system. Its results can be considered as a definition of measurement of energy in quantum mechanics. The Schrodinger equation describes the space- and time-dependence of a slowly changing (non-relativistic) wave function of quantum systems. The solution of this equation for a bound system is discrete (a set of permitted states, each characterized by an energy level) which results in the concept of quanta. In the solution of the Schrodinger equation for any oscillator (vibrator) and for electromagnetic waves in a vacuum, the resulting energy states are related to the frequency by Planck's relation: (where is Planck's constant and the frequency). In the case of an electromagnetic wave these energy states are called quanta of light or photons.
What is the answer to this question: What describes the space-and-time dependence of a slowly changing wave function of quantum systems?
****
So... The Schrodinger equation

Article: The development of a three-field rotation system for planting crops[AA] increased the usage of land from one half in use each year under the old two-field system to two-thirds under the new system, with a consequent increase in production. The development of the heavy plough allowed heavier soils to be farmed more efficiently, aided by the spread of the horse collar, which led to the use of draught horses in place of oxen. Horses are faster than oxen and require less pasture, factors that aided the implementation of the three-field system.

Question: What invention allowed horses rather than oxen to be used to plow?
Ans:
the horse collar