The problem: Answer a question about this article:
At the end of November, Chopin returned to Paris. He passed the winter in unremitting illness, but gave occasional lessons and was visited by friends, including Delacroix and Franchomme. Occasionally he played, or accompanied the singing of Delfina Potocka, for his friends. During the summer of 1849, his friends found him an apartment in Chaillot, out of the centre of the city, for which the rent was secretly subsidised by an admirer, Princess Obreskoff. Here in June 1849 he was visited by Jenny Lind.
When did Jenny Lind visit Chopin?
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The answer: June 1849


Problem: Please answer a question about the following article about Elizabeth II:
Since Elizabeth rarely gives interviews, little is known of her personal feelings. As a constitutional monarch, she has not expressed her own political opinions in a public forum. She does have a deep sense of religious and civic duty, and takes her coronation oath seriously. Aside from her official religious role as Supreme Governor of the established Church of England, she is personally a member of that church and the national Church of Scotland. She has demonstrated support for inter-faith relations and has met with leaders of other churches and religions, including five popes: Pius XII, John XXIII, John Paul II, Benedict XVI and Francis. A personal note about her faith often features in her annual Christmas message broadcast to the Commonwealth. In 2000, she spoke about the theological significance of the millennium marking the 2000th anniversary of the birth of Jesus:
How often does Elizabeth give interviews?
A: rarely


Question: Read this and answer the question

Universal Studios was founded by Carl Laemmle, Mark Dintenfass, Charles O. Baumann, Adam Kessel, Pat Powers, William Swanson, David Horsley, Robert H. Cochrane[a] and Jules Brulatour. One story has Laemmle watching a box office for hours, counting patrons and calculating the day's takings. Within weeks of his Chicago trip, Laemmle gave up dry goods to buy the first several nickelodeons. For Laemmle and other such entrepreneurs, the creation in 1908 of the Edison-backed Motion Picture Trust meant that exhibitors were expected to pay fees for Trust-produced films they showed. Based on the Latham Loop used in cameras and projectors, along with other patents, the Trust collected fees on all aspects of movie production and exhibition, and attempted to enforce a monopoly on distribution.

After a trip to what city did Carl Laemmle leave the dry goods business?
Answer: Chicago


Problem: The most powerful used method works by comparing each frame in the video with the previous one. If the frame contains areas where nothing has moved, the system simply issues a short command that copies that part of the previous frame, bit-for-bit, into the next one. If sections of the frame move in a simple manner, the compressor emits a (slightly longer) command that tells the decompressor to shift, rotate, lighten, or darken the copy. This longer command still remains much shorter than intraframe compression. Interframe compression works well for programs that will simply be played back by the viewer, but can cause problems if the video sequence needs to be edited.
What still remains much shorter than intraframe compression?
The answer is the following: longer command


Jews also spread across Europe during the period. Communities were established in Germany and England in the 11th and 12th centuries, but Spanish Jews, long settled in Spain under the Muslims, came under Christian rule and increasing pressure to convert to Christianity. Most Jews were confined to the cities, as they were not allowed to own land or be peasants.[U] Besides the Jews, there were other non-Christians on the edges of Europe—pagan Slavs in Eastern Europe and Muslims in Southern Europe.
What religion were Spanish Jews pressured into converting to?
Christianity


Here is a question about this article: Transport is one of the four main areas of policy administered by the Mayor of London, however the mayor's financial control does not extend to the longer distance rail network that enters London. In 2007 he assumed responsibility for some local lines, which now form the London Overground network, adding to the existing responsibility for the London Underground, trams and buses. The public transport network is administered by Transport for London (TfL) and is one of the most extensive in the world.
What is the answer to this question: Which elected official is financially responsible for public transportation in London, except for long-distance railways?
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So...
the Mayor of London