Problem: 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?
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A: Viardot


Problem: At about the same time, Charles Coffin, leading the Thomson-Houston Electric Company, acquired a number of competitors and gained access to their key patents. General Electric was formed through the 1892 merger of Edison General Electric Company of Schenectady, New York, and Thomson-Houston Electric Company of Lynn, Massachusetts, with the support of Drexel, Morgan & Co. Both plants continue to operate under the GE banner to this day. The company was incorporated in New York, with the Schenectady plant used as headquarters for many years thereafter. Around the same time, General Electric's Canadian counterpart, Canadian General Electric, was formed.
Who led the Thomson-Houston Electric Company when GE was formed?
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Answer: Charles Coffin


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
While on tour Madonna participated in the Raising Malawi initiative by partially funding an orphanage in and traveling to that country. While there, she decided to adopt a boy named David Banda in October 2006. The adoption raised strong public reaction, because Malawian law requires would-be parents to reside in Malawi for one year before adopting, which Madonna did not do. She addressed this on The Oprah Winfrey Show, saying that there were no written adoption laws in Malawi that regulated foreign adoption. She described how Banda had been suffering from pneumonia after surviving malaria and tuberculosis when she first met him. Banda's biological father, Yohane, commented, "These so-called human rights activists are harassing me every day, threatening me that I am not aware of what I am doing..... They want me to support their court case, a thing I cannot do for I know what I agreed with Madonna and her husband." The adoption was finalized in May 2008.
What was the charity that Madonna was involved in when in Malawi?
A: Raising Malawi initiative


Context and question: Many ancient civilizations alloyed metals for purely aesthetic purposes. In ancient Egypt and Mycenae, gold was often alloyed with copper to produce red-gold, or iron to produce a bright burgundy-gold. Gold was often found alloyed with silver or other metals to produce various types of colored gold. These metals were also used to strengthen each other, for more practical purposes. Copper was often added to silver to make sterling silver, increasing its strength for use in dishes, silverware, and other practical items. Quite often, precious metals were alloyed with less valuable substances as a means to deceive buyers. Around 250 BC, Archimedes was commissioned by the king to find a way to check the purity of the gold in a crown, leading to the famous bath-house shouting of "Eureka!" upon the discovery of Archimedes' principle.
Ten is often added to what to make sterling silver?
Answer: unanswerable


Question: Informal learning usually takes place outside educational establishments, does not follow a specified curriculum and may originate accidentally, sporadically, in association with certain occasions, from changing practical requirements. It is not necessarily planned to be pedagogically conscious, systematic and according to subjects, but rather unconsciously incidental, holistically problem-related, and related to situation management and fitness for life. It is experienced directly in its "natural" function of everyday life and is often spontaneous.
Is there an answer to this question: Where does informal learning usually take place?

Answer: outside educational establishments


Problem: Estonia:

Although initially the Germans were welcomed by most Estonians as liberators from the USSR and its oppressions, and hopes were raised for the restoration of the country's independence, it was soon realised that the Nazis were but another occupying power. The Germans used Estonia's resources for their war effort; for the duration of the occupation Estonia was incorporated into the German province of Ostland. The Germans and their collaborators also carried out The Holocaust in Estonia in which they established a network of concentration camps and murdered thousands of Estonian Jews and Estonian Gypsies, other Estonians, non-Estonian Jews, and Soviet prisoners of war.

Who was in control of Estonia before the Germans?
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A:
the USSR