Problem: Please answer a question about the following article about Compact disc:
The logical format of an audio CD (officially Compact Disc Digital Audio or CD-DA) is described in a document produced in 1980 by the format's joint creators, Sony and Philips. The document is known colloquially as the Red Book CD-DA after the colour of its cover. The format is a two-channel 16-bit PCM encoding at a 44.1 kHz sampling rate per channel. Four-channel sound was to be an allowable option within the Red Book format, but has never been implemented. Monaural audio has no existing standard on a Red Book CD; thus, mono source material is usually presented as two identical channels in a standard Red Book stereo track (i.e., mirrored mono); an MP3 CD, however, can have audio file formats with mono sound.
Do CDs have a two or four channel format?
A: two-channel

Question: Read this and answer the question

During 182428 Chopin spent his vacations away from Warsaw, at a number of locales.[n 4] In 1824 and 1825, at Szafarnia, he was a guest of Dominik Dziewanowski, the father of a schoolmate. Here for the first time he encountered Polish rural folk music. His letters home from Szafarnia (to which he gave the title "The Szafarnia Courier"), written in a very modern and lively Polish, amused his family with their spoofing of the Warsaw newspapers and demonstrated the youngster's literary gift.

To whom did Frederic write letters to during his stay in Szafarnia?
Answer: his family

Problem: In June 1854, the Allied expeditionary force landed at Varna, a city on the Black Sea's western coast (now in Bulgaria). They made little advance from their base there.:175176 In July 1854, the Turks under Omar Pasha crossed the Danube into Wallachia and on 7 July 1854, engaged the Russians in the city of Giurgiu and conquered it. The capture of Giurgiu by the Turks immediately threatened Bucharest in Wallachia with capture by the same Turk army. On 26 July 1854, Tsar Nicholas I ordered the withdrawal of Russian troops from the Principalities. Also, in late July 1854, following up on the Russian retreat, the French staged an expedition against the Russian forces still in Dobruja, but this was a failure.:188190
In what year did the Turks cross the Danube into Wallachia ?
The answer is the following: 1854

During the 12th century, the institutions of central government, which had hitherto accompanied the royal English court as it moved around the country, grew in size and sophistication and became increasingly fixed in one place. In most cases this was Westminster, although the royal treasury, having been moved from Winchester, came to rest in the Tower. While the City of Westminster developed into a true capital in governmental terms, its distinct neighbour, the City of London, remained England's largest city and principal commercial centre, and it flourished under its own unique administration, the Corporation of London. In 1100, its population was around 18,000; by 1300 it had grown to nearly 100,000.
What was the administration which governed the City of London called?
the Corporation of London

Input: Frederic Chopin
Two Polish friends in Paris were also to play important roles in Chopin's life there. His fellow student at the Warsaw Conservatory, Julian Fontana, had originally tried unsuccessfully to establish himself in England; Albert Grzymaa, who in Paris became a wealthy financier and society figure, often acted as Chopin's adviser and "gradually began to fill the role of elder brother in [his] life." Fontana was to become, in the words of Michaowski and Samson, Chopin's "general factotum and copyist".

Which friend took on the role of several jobs to help Chopin including copyist?
Output: Julian Fontana

Problem: Please answer a question about the following article about Exhibition game:
Several MLB teams used to play regular exhibition games during the year against nearby teams in the other major league, but regular-season interleague play has made such games unnecessary. The two Canadian MLB teams, the Toronto Blue Jays of the American League and the Montreal Expos of the National League, met annually to play the Pearson Cup exhibition game; this tradition ended when the Expos moved to Washington DC for the 2005 season. Similarly, the New York Yankees played in the Mayor's Trophy Game against various local rivals from 1946 to 1983.
What league are the Toronto Bluejays in?
A:
American League