Input: Frédéric Chopin
In London Chopin took lodgings at Dover Street, where the firm of Broadwood provided him with a grand piano. At his first engagement, on 15 May at Stafford House, the audience included Queen Victoria and Prince Albert. The Prince, who was himself a talented musician, moved close to the keyboard to view Chopin's technique. Broadwood also arranged concerts for him; among those attending were Thackeray and the singer Jenny Lind. Chopin was also sought after for piano lessons, for which he charged the high fee of one guinea (£1.05 in present British currency) per hour, and for private recitals for which the fee was 20 guineas. At a concert on 7 July he shared the platform with Viardot, who sang arrangements of some of his mazurkas to Spanish texts.

Who sang chopin arrangements on July 7 of the year Chopin was in London?
Output: Viardot


Input: Article: All the major British cities had flourishing department stores by the mid-or late nineteenth century. Increasingly, women became the major shoppers and middle-class households. Kendals (formerly Kendal Milne & Faulkner) in Manchester lays claim to being one of the first department stores and is still known to many of its customers as Kendal's, despite its 2005 name change to House of Fraser. The Manchester institution dates back to 1836 but had been trading as Watts Bazaar since 1796. At its zenith the store had buildings on both sides of Deansgate linked by a subterranean passage "Kendals Arcade" and an art nouveau tiled food hall. The store was especially known for its emphasis on quality and style over low prices giving it the nickname "the Harrods of the North", although this was due in part to Harrods acquiring the store in 1919. Other large Manchester stores included Paulden's (currently Debenhams) and Lewis's (now a Primark).

Now answer this question: Who acquired the Manchester store in 1919? 

Output: Harrods


Article: A samurai could take concubines but their backgrounds were checked by higher-ranked samurai. In many cases, taking a concubine was akin to a marriage. Kidnapping a concubine, although common in fiction, would have been shameful, if not criminal. If the concubine was a commoner, a messenger was sent with betrothal money or a note for exemption of tax to ask for her parents' acceptance. Even though the woman would not be a legal wife, a situation normally considered a demotion, many wealthy merchants believed that being the concubine of a samurai was superior to being the legal wife of a commoner. When a merchant's daughter married a samurai, her family's money erased the samurai's debts, and the samurai's social status improved the standing of the merchant family. If a samurai's commoner concubine gave birth to a son, the son could inherit his father's social status.

Question: How did the samurai treat concubines?
Ans: akin to a marriage


Here is a question about this article: A famous example of Spielberg working with the same professionals is his long-time collaboration with John Williams and the use of his musical scores in all of his films since The Sugarland Express (except Bridge of Spies, The Color Purple and Twilight Zone: The Movie). One of Spielberg's trademarks is his use of music by Williams to add to the visual impact of his scenes and to try and create a lasting picture and sound of the film in the memories of the film audience. These visual scenes often uses images of the sun (e.g. Empire of the Sun, Saving Private Ryan, the final scene of Jurassic Park, and the end credits of Indiana Jones and the Last Crusade (where they ride into the sunset)), of which the last two feature a Williams score at that end scene. Spielberg is a contemporary of filmmakers George Lucas, Francis Ford Coppola, Martin Scorsese, John Milius, and Brian De Palma, collectively known as the "Movie Brats". Aside from his principal role as a director, Spielberg has acted as a producer for a considerable number of films, including early hits for Joe Dante and Robert Zemeckis. Spielberg has often never worked with the same screenwriter in his films, beside Tony Kushner and David Koepp, who have written a few of his films more than once.
What is the answer to this question: Who are the 'Movie Brats', besides Spielberg?
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So... George Lucas, Francis Ford Coppola, Martin Scorsese, John Milius, and Brian De Palma


The problem: Answer a question about this article:
On 24 March 2009, the Nigerian Federal Ministry of Science and Technology, NigComSat Ltd. and CGWIC signed another contract for the in-orbit delivery of the NigComSat-1R satellite. NigComSat-1R was also a DFH-4 satellite, and the replacement for the failed NigComSat-1 was successfully launched into orbit by China in Xichang on December 19, 2011. The satellite according to then-Nigerian President Goodluck Jonathan which was paid for by the insurance policy on NigComSat-1 which de-orbited in 2009, would have a positive impact on national development in various sectors such as communications, internet services, health, agriculture, environmental protection and national security.
When was Nigeria's fourth satellite launched?
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The answer: December 19, 2011


The problem: Answer a question about this article:
The British dealt with range measurement first, when it was realised that range was the key to producing a better fuse setting. This led to the Height/Range Finder (HRF), the first model being the Barr & Stroud UB2, a 2-metre optical coincident rangefinder mounted on a tripod. It measured the distance to the target and the elevation angle, which together gave the height of the aircraft. These were complex instruments and various other methods were also used. The HRF was soon joined by the Height/Fuse Indicator (HFI), this was marked with elevation angles and height lines overlaid with fuse length curves, using the height reported by the HRF operator, the necessary fuse length could be read off.
The fuse length could be set using height reported by whom?
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The answer:
HRF operator