Q: Extract the answer to the question from the following context. Question: Why did using the method Bach didn't use, gain traction? Context: The theories surrounding equal temperament began to be put in wider practice, especially as it enabled a wider range of chromatic possibilities in hard-to-tune keyboard instruments. Although Bach did not use equal temperament, as a modern piano is generally tuned, changes in the temperaments from the meantone system, common at the time, to various temperaments that made modulation between all keys musically acceptable, made possible Bach's Well-Tempered Clavier.
A: it enabled a wider range of chromatic possibilities in hard-to-tune keyboard instruments

Q: Extract the answer to the question from the following context. Question: Which is a very difficult puzzle? Context: The Times's main supplement, every day, is the times2, featuring various lifestyle columns. It was discontinued on 1 March 2010 but reintroduced on 11 October 2010 after negative feedback. Its regular features include a puzzles section called Mind Games. Its previous incarnation began on 5 September 2005, before which it was called T2 and previously Times 2. Regular features include columns by a different columnist each weekday. There was a column by Marcus du Sautoy each Wednesday, for example. The back pages are devoted to puzzles and contain sudoku, "Killer Sudoku", "KenKen", word polygon puzzles, and a crossword simpler and more concise than the main "Times Crossword".
A: Killer Sudoku

Q: Extract the answer to the question from the following context. Question: Who was better Daughtry or Pickler Context: Despite being eliminated earlier in the season, Chris Daughtry (as lead of the band Daughtry) became the most successful recording artist from this season. Other contestants, such as Hicks, McPhee, Bucky Covington, Mandisa, Kellie Pickler, and Elliott Yamin have had varying levels of success.
A: Daughtry

Q: Extract the answer to the question from the following context. Question: What was Bell's duty in the Clarke School for the Deaf? Context: Bell's father was invited by Sarah Fuller, principal of the Boston School for Deaf Mutes (which continues today as the public Horace Mann School for the Deaf), in Boston, Massachusetts, to introduce the Visible Speech System by providing training for Fuller's instructors, but he declined the post in favor of his son. Traveling to Boston in April 1871, Bell proved successful in training the school's instructors. He was subsequently asked to repeat the program at the American Asylum for Deaf-mutes in Hartford, Connecticut, and the Clarke School for the Deaf in Northampton, Massachusetts.
A:
repeat the program