In this task, you are given a question and a context passage. You have to answer the question based on the given passage.

[Q]: The expansion of what further cemented Houston's emergence as a powerhouse commercial city?, Context: By 1860, Houston had emerged as a commercial and railroad hub for the export of cotton. Railroad spurs from the Texas inland converged in Houston, where they met rail lines to the ports of Galveston and Beaumont. During the American Civil War, Houston served as a headquarters for General John Bankhead Magruder, who used the city as an organization point for the Battle of Galveston. After the Civil War, Houston businessmen initiated efforts to widen the city's extensive system of bayous so the city could accept more commerce between downtown and the nearby port of Galveston. By 1890, Houston was the railroad center of Texas.
[A]: bayous

[Q]: Which of the following is NOT a goal of phorphor LED development: higher light output, optical losses, or higher operation temperatures?, Context: Among the challenges being faced to improve the efficiency of LED-based white light sources is the development of more efficient phosphors. As of 2010, the most efficient yellow phosphor is still the YAG phosphor, with less than 10% Stoke shift loss. Losses attributable to internal optical losses due to re-absorption in the LED chip and in the LED packaging itself account typically for another 10% to 30% of efficiency loss. Currently, in the area of phosphor LED development, much effort is being spent on optimizing these devices to higher light output and higher operation temperatures. For instance, the efficiency can be raised by adapting better package design or by using a more suitable type of phosphor. Conformal coating process is frequently used to address the issue of varying phosphor thickness.
[A]: optical losses

[Q]: How many points were scored by the winner of the 2014 FA Community Shield?, Context: Arsenal reached the final of the 2007 and 2011 League Cups, losing 21 to Chelsea and Birmingham City respectively. The club had not gained a major trophy since the 2005 FA Cup until 17 May 2014, when Arsenal beat Hull City in the 2014 FA Cup Final, coming back from a 20 deficit to win the match 32. This qualified them for the 2014 FA Community Shield where they would play Premier League champions Manchester City. They recorded a resounding 30 win in the game, winning their second trophy in three months. Nine months after their Community Shield triumph, Arsenal appeared in the FA Cup final for the second year in a row, thrashing Aston Villa 40 in the final and becoming the most successful club in the tournament's history with 12 titles. On 2 August 2015, Arsenal beat Chelsea 10 at Wembley Stadium to retain the Community Shield and earn their 14th Community Shield title.
[A]:
3