This task is about writing a correct answer for the reading comprehension task. Based on the information provided in a given passage, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.

[Q]: Passage: The "Rheinische" Carnival is held in the west of Germany, mainly in the states of North Rhine-Westphalia or Nordrhein-Westfalen, Rhineland Palatinate or Rheinland-Pfalz, but also in Hessen [including Oberhessen], Bavaria and other states. Some cities are more famous for celebrations such as parades and costume balls. Koln or Cologne Carnival, as well as Mainz and Dusseldorf are the largest and most famous. Other cities have their own, often less well-known celebrations, parades and parties such as Worms am Rhein, Speyer, Kaiserslautern, Frankfurt, Darmstadt, Mannheim, Ludwigshafen, Stuttgart, Augsburg and Munchen [Munich] Nurnberg. On Carnival Thursday (called "Old Women Day" or "The Women's Day") in commemoration of an 1824 revolt by washer-women, women storm city halls, cut men's ties, and are allowed to kiss any passing man. Question: Cologne Carnival is one of the largest Carnivals and also is the most what?
[A]: famous

[Q]: Passage: Brass instruments in the Renaissance were traditionally played by professionals who were members of Guilds and they included the slide trumpet, the wooden cornet, the valveless trumpet and the sackbut. Stringed instruments included the viol, the harp-like lyre, the hurdy-gurdy, the cittern and the lute. Keyboard instruments with strings included the harpsichord and the virginal. Percussion instruments include the triangle, the Jew's harp, the tambourine, the bells, the rumble-pot, and various kinds of drums. Woodwind instruments included the double reed shawm, the reed pipe, the bagpipe, the transverse flute and the recorder. Question: Brass instruments were traditionally played by profession guild members during what era?
[A]: the Renaissance

[Q]: Passage: In the following year, Bell became professor of Vocal Physiology and Elocution at the Boston University School of Oratory. During this period, he alternated between Boston and Brantford, spending summers in his Canadian home. At Boston University, Bell was "swept up" by the excitement engendered by the many scientists and inventors residing in the city. He continued his research in sound and endeavored to find a way to transmit musical notes and articulate speech, but although absorbed by his experiments, he found it difficult to devote enough time to experimentation. While days and evenings were occupied by his teaching and private classes, Bell began to stay awake late into the night, running experiment after experiment in rented facilities at his boarding house. Keeping "night owl" hours, he worried that his work would be discovered and took great pains to lock up his notebooks and laboratory equipment. Bell had a specially made table where he could place his notes and equipment inside a locking cover. Worse still, his health deteriorated as he suffered severe headaches. Returning to Boston in fall 1873, Bell made a fateful decision to concentrate on his experiments in sound. Question: In what year did Bell start to focus on research into sound?
[A]:
1873