Problem: Valencia:

In 1409, a hospital was founded and placed under the patronage of Santa María de los Inocentes; to this was attached a confraternity devoted to recovering the bodies of the unfriended dead in the city and within a radius of three miles (4.8 km) around it. At the end of the 15th century this confraternity separated from the hospital, and continued its work under the name of "Cofradia para el ámparo de los desamparados". King Philip IV of Spain and the Duke of Arcos suggested the building of the new chapel, and in 1647 the Viceroy, Conde de Oropesa, who had been preserved from the bubonic plague, insisted on carrying out their project. The Blessed Virgin was proclaimed patroness of the city under the title of Virgen de los desamparados (Virgin of the Forsaken), and Archbishop Pedro de Urbina, on 31 June 1652, laid the cornerstone of the new chapel of this name. The archiepiscopal palace, a grain market in the time of the Moors, is simple in design, with an inside cloister and a handsome chapel. In 1357, the arch that connects it with the cathedral was built. In the council chamber are preserved the portraits of all the prelates of Valencia.

Who insisted on building the new chapel?
---
A: Conde de Oropesa


Problem: Luftwaffe policy at this point was primarily to continue progressive attacks on London, chiefly by night attack; second, to interfere with production in the vast industrial arms factories of the West Midlands, again chiefly by night attack; and third to disrupt plants and factories during the day by means of fighter-bombers. Kesselring, commanding Luftflotte 2, was ordered to send 50 sorties per night against London and attack eastern harbours in daylight. Sperrle, commanding Luftflotte 3, was ordered to dispatch 250 sorties per night including 100 against the West Midlands. Seeschlange would be carried out by Fliegerkorps X (10th Air Corps) which concentrated on mining operations against shipping. It also took part in the bombing over Britain. By 19/20 April 1941, it had dropped 3,984 mines, ⅓ of the total dropped. The mines' ability to destroy entire streets earned them respect in Britain, but several fell unexploded into British hands allowing counter-measures to be developed which damaged the German anti-shipping campaign.
By April of 1941 about how many mines had been dropped?
---
Answer: 3,984 mines


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Sectional tensions had long existed between the states located north of the Mason–Dixon line and those south of it, primarily centered on the "peculiar institution" of slavery and the ability of states to overrule the decisions of the national government. During the 1840s and 1850s, conflicts between the two sides became progressively more violent. After the election of Abraham Lincoln in 1860 (who southerners thought would work to end slavery) states in the South seceded from the United States, beginning with South Carolina in late 1860. On April 12, 1861, forces of the South (known as the Confederate States of America or simply the Confederacy) opened fire on Fort Sumter, whose garrison was loyal to the Union.
 When was Lincoln kicked out?
A: unanswerable


Context and question: In 2012, the city contained a total of 594 high-rise buildings, with 8 under construction, 71 planned and 39 at proposal stage making the city's skyline the second largest in Australia. The CBD is dominated by modern office buildings including the Rialto Towers (1986), built on the site of several grand classical Victorian buildings, two of which — the Rialto Building (1889) designed by William Pitt and the Winfield Building (1890) designed by Charles D'Ebro and Richard Speight — still remain today and more recently hi-rise apartment buildings including Eureka Tower (2006), which is listed as the 13th tallest residential building in the world in January 2014.
Who designed the Rialto Building in 1889? 
Answer: William Pitt


Question: The earliest known inscriptions in Sanskrit date to the first century BCE.[citation needed] They are in the Brahmi script, which was originally used for Prakrit, not Sanskrit. It has been described as a paradox that the first evidence of written Sanskrit occurs centuries later than that of the Prakrit languages which are its linguistic descendants. In northern India, there are Brāhmī inscriptions dating from the third century BCE onwards, the oldest appearing on the famous Prakrit pillar inscriptions of king Ashoka. The earliest South Indian inscriptions in Tamil Brahmi, written in early Tamil, belong to the same period. When Sanskrit was written down, it was first used for texts of an administrative, literary or scientific nature. The sacred texts were preserved orally, and were set down in writing "reluctantly" (according to one commentator), and at a comparatively late date.
Is there an answer to this question: In what language was Brahmi first used?

Answer: Prakrit


Problem: Light-emitting diode:

An LED filament consists of multiple LED dice connected in series on a common longitudinal substrate that form a thin rod reminiscent of a traditional incandescent filament. These are being used as a low cost decorative alternative for traditional light bulbs that are being phased out in many countries. The filaments require a rather high voltage to light to nominal brightness, allowing them to work efficiently and simply with mains voltages. Often a simple rectifier and capacitive current limiting are employed to create a low-cost replacement for a traditional light bulb without the complexity of creating a low voltage, high current converter which is required by single die LEDs. Usually they are packaged in a sealed enclosure with a shape similar to lamps they were designed to replace (e.g. a bulb), and filled with inert nitrogen or carbon dioxide gas to remove heat efficiently.

What type of voltage is needed for LED filaments?
---
A:
high