Input: Transistor
The essential usefulness of a transistor comes from its ability to use a small signal applied between one pair of its terminals to control a much larger signal at another pair of terminals. This property is called gain. It can produce a stronger output signal, a voltage or current, which is proportional to a weaker input signal; that is, it can act as an amplifier. Alternatively, the transistor can be used to turn current on or off in a circuit as an electrically controlled switch, where the amount of current is determined by other circuit elements.

Why is a transistor so useful?
Output: gain

Input: Plymouth
The city was also home to the Royal Naval Engineering College; opened in 1880 in Keyham, it trained engineering students for five years before they completed the remaining two years of the course at Greenwich. The college closed in 1910, but in 1940 a new college opened at Manadon. This was renamed Dockyard Technical College in 1959 before finally closing in 1994; training was transferred to the University of Southampton.

What maritime institution of higher education existed in Plymouth as of 1880?
Output: the Royal Naval Engineering College

Input: Valencia
This boom was reflected in the growth of artistic and cultural pursuits. Some of the most emblematic buildings of the city were built during this period, including the Serranos Towers (1392), the Lonja (1482), the Miguelete and the Chapel of the Kings of the Convent of Santo Domingo. In painting and sculpture, Flemish and Italian trends had an influence on artists such as Lluis Dalmau, Peris Goncal and Damia Forment. Literature flourished with the patronage of the court of Alfonso the Magnanimous, supporting authors like Ausias March, Roic de Corella, and Isabel de Villena. By 1460 Joanot Martorell wrote Tirant lo Blanch, an innovative novel of chivalry that influenced many later writers, from Cervantes to Shakespeare. Ausias March was one of the first poets to use the everyday language Valencian, instead of the troubadour language, Occitan. Also around this time, between 1499 and 1502, the University of Valencia was founded under the parsimonious name of Estudio General ("studium generale", place of general studies).

Who was an early poet to use Valencian?
Output: Ausias March

Input: Crimean War
A large Russian assault on the allied supply base to the southeast, at Balaclava was rebuffed on 25 October 1854.:521527 The Battle of Balaclava is remembered in the UK for the actions of two British units. At the start of the battle, a large body of Russian cavalry charged the 93rd Highlanders, who were posted north of the village of Kadikoi. Commanding them was Sir Colin Campbell. Rather than 'form square', the traditional method of repelling cavalry, Campbell took the risky decision to have his Highlanders form a single line, two men deep. Campbell had seen the effectiveness of the new Minie rifles, with which his troops were armed, at the Battle of the Alma a month before, and was confident his men could beat back the Russians. His tactics succeeded. From up on the ridge to the west, Times correspondent William Howard Russell saw the Highlanders as a 'thin red streak topped with steel', a phrase which soon became the 'Thin Red Line.'

Who did the Russians attack at the beginning off the Battle of Balaclava?
Output:
93rd Highlanders