Problem: Extract the answer to the question from the following context. Question: A depression in an object that is also usually long is called a? Context: Due to recording mastering and manufacturing limitations, both high and low frequencies were removed from the first recorded signals by various formulae. With low frequencies, the stylus must swing a long way from side to side, requiring the groove to be wide, taking up more space and limiting the playing time of the record. At high frequencies, hiss, pops, and ticks are significant. These problems can be reduced by using equalization to an agreed standard. During recording the amplitude of low frequencies is reduced, thus reducing the groove width required, and the amplitude at high frequencies is increased. The playback equipment boosts bass and cuts treble so as to restore the tonal balance in the original signal; this also reduces the high frequency noise. Thus more music will fit on the record, and noise is reduced.

A: groove

Problem: Extract the answer to the question from the following context. Question: Did Barcelona score fewer goals in the first or second match? Context: In 1943, Barcelona faced rivals Real Madrid in the semi-finals of Copa del Generalisimo (now the Copa del Rey). The first match at Les Corts was won by Barcelona 30. Real Madrid comfortably won the second leg, beating Barcelona 111. According to football writer Sid Lowe, "There have been relatively few mentions of the game [since] and it is not a result that has been particularly celebrated in Madrid. Indeed, the 111 occupies a far more prominent place in Barcelona's history." It has been alleged by local journalist Paco Aguilar that Barcelona's players were threatened by police in the changing room, though nothing was ever proven.

A: second

Problem: Extract the answer to the question from the following context. Question: what is a brand of toothpaste? Context: The club's original crest was a quartered diamond-shaped crest topped by the Crown of Aragon and the bat of King James, and surrounded by two branches, one of a laurel tree and the other a palm. In 1910 the club held a competition among its members to design a new crest. The winner was Carles Comamala, who at the time played for the club. Comamala's suggestion became the crest that the club wears today, with some minor variations. The crest consists of the St George Cross in the upper-left corner with the Catalan flag beside it, and the team colours at the bottom.

A: crest

Problem: Extract the answer to the question from the following context. Question: Which happened first, Kathy Kozachenko's victory in an Ann Arbor city-council race or Ann Arbor becoming the first U.S. city to use instant-runoff voting for a mayoral race? Context: Left-wing politics have been particularly strong in municipal government since the 1960s. Voters approved charter amendments that have lessened the penalties for possession of marijuana (1974), and that aim to protect access to abortion in the city should it ever become illegal in the State of Michigan (1990). In 1974, Kathy Kozachenko's victory in an Ann Arbor city-council race made her the country's first openly homosexual candidate to win public office. In 1975, Ann Arbor became the first U.S. city to use instant-runoff voting for a mayoral race. Adopted through a ballot initiative sponsored by the local Human Rights Party, which feared a splintering of the liberal vote, the process was repealed in 1976 after use in only one election. As of August 2009, Democrats hold the mayorship and all council seats. The left tilt of politics in the city has earned it the nickname "The People's Republic of Ann Arbor". Nationally, Ann Arbor is located in Michigan's 12th congressional district, represented by Democrat Debbie Dingell.

A:
Kathy Kozachenko's victory in an Ann Arbor city-council race