The problem: Answer a question about this article:
After the Dambusters raid in 1943 an entirely new system was developed that was required to knock down any low-flying aircraft with a single hit. The first attempt to produce such a system used a 50 mm gun, but this proved inaccurate and a new 55 mm gun replaced it. The system used a centralised control system including both search and targeting radar, which calculated the aim point for the guns after considering windage and ballistics, and then sent electrical commands to the guns, which used hydraulics to point themselves at high speeds. Operators simply fed the guns and selected the targets. This system, modern even by today's standards, was in late development when the war ended.
What type of control system did the 55 millimeter gun use?
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The answer: a centralised control system

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Daniel Gralath was the first to combine several jars in parallel into a "battery" to increase the charge storage capacity. Benjamin Franklin investigated the Leyden jar and came to the conclusion that the charge was stored on the glass, not in the water as others had assumed. He also adopted the term "battery", (denoting the increasing of power with a row of similar units as in a battery of cannon), subsequently applied to clusters of electrochemical cells. Leyden jars were later made by coating the inside and outside of jars with metal foil, leaving a space at the mouth to prevent arcing between the foils.[citation needed] The earliest unit of capacitance was the jar, equivalent to about 1.11 nanofarads.
Who was the first person to connect several Leyden jars in parallel?
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The answer: Daniel Gralath

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Soon, Laemmle and other disgruntled nickelodeon owners decided to avoid paying Edison by producing their own pictures. In June 1909, Laemmle started the Yankee Film Company with partners Abe Stern and Julius Stern. That company quickly evolved into the Independent Moving Pictures Company (IMP), with studios in Fort Lee, New Jersey, where many early films in America's first motion picture industry were produced in the early 20th century. Laemmle broke with Edison's custom of refusing to give billing and screen credits to performers. By naming the movie stars, he attracted many of the leading players of the time, contributing to the creation of the star system. In 1910, he promoted Florence Lawrence, formerly known as "The Biograph Girl", and actor King Baggot, in what may be the first instance of a studio using stars in its marketing.
What was a nickname of Florence Lawrence?
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The answer: The Biograph Girl

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Y DNA studies tend to imply a small number of founders in an old population whose members parted and followed different migration paths. In most Jewish populations, these male line ancestors appear to have been mainly Middle Eastern. For example, Ashkenazi Jews share more common paternal lineages with other Jewish and Middle Eastern groups than with non-Jewish populations in areas where Jews lived in Eastern Europe, Germany and the French Rhine Valley. This is consistent with Jewish traditions in placing most Jewish paternal origins in the region of the Middle East. Conversely, the maternal lineages of Jewish populations, studied by looking at mitochondrial DNA, are generally more heterogeneous. Scholars such as Harry Ostrer and Raphael Falk believe this indicates that many Jewish males found new mates from European and other communities in the places where they migrated in the diaspora after fleeing ancient Israel. In contrast, Behar has found evidence that about 40% of Ashkenazi Jews originate maternally from just four female founders, who were of Middle Eastern origin. The populations of Sephardi and Mizrahi Jewish communities "showed no evidence for a narrow founder effect." Subsequent studies carried out by Feder et al. confirmed the large portion of non-local maternal origin among Ashkenazi Jews. Reflecting on their findings related to the maternal origin of Ashkenazi Jews, the authors conclude "Clearly, the differences between Jews and non-Jews are far larger than those observed among the Jewish communities. Hence, differences between the Jewish communities can be overlooked when non-Jews are included in the comparisons."
Ashkenazi Jews share more common paternal lineages with what group?
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The answer:
Jewish and Middle Eastern groups