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

Example Input: How can you reduce the jnd?, Context: The just-noticeable difference (jnd) (the threshold at which a change is perceived) depends on the tone's frequency content. Below 500 Hz, the jnd is about 3 Hz for sine waves, and 1 Hz for complex tones; above 1000 Hz, the jnd for sine waves is about 0.6% (about 10 cents). The jnd is typically tested by playing two tones in quick succession with the listener asked if there was a difference in their pitches. The jnd becomes smaller if the two tones are played simultaneously as the listener is then able to discern beat frequencies. The total number of perceptible pitch steps in the range of human hearing is about 1,400; the total number of notes in the equal-tempered scale, from 16 to 16,000 Hz, is 120.
Example Output: two tones are played simultaneously

Example Input: What vehicle could you have that you would need lower pressure boiler feed water?, Context: The Rankine cycle and most practical steam engines have a water pump to recycle or top up the boiler water, so that they may be run continuously. Utility and industrial boilers commonly use multi-stage centrifugal pumps; however, other types are used. Another means of supplying lower-pressure boiler feed water is an injector, which uses a steam jet usually supplied from the boiler. Injectors became popular in the 1850s but are no longer widely used, except in applications such as steam locomotives.
Example Output: steam locomotives

Example Input: Which team is affliated with the person in charge of fixing the Levi's Stadium field for game day?, Context: Concerns were raised over whether Levi's Stadium's field was of a high enough quality to host a Super Bowl; during the inaugural season, the field had to be re-sodded multiple times due to various issues, and during a week 6 game earlier in the 2015 season, a portion of the turf collapsed under Baltimore Ravens kicker Justin Tucker, causing him to slip and miss a field goal, although the field has not had any major issues since. As is customary for Super Bowl games played at natural grass stadiums, the NFL re-sodded the field with a new playing surface; a hybrid Bermuda 419 turf. NFL and Atlanta Braves field director Ed Mangan stated that the field was in "great shape" for gameday. However, the turf showed problem throughout the game, with a number of players needing to change their cleats during the game and player slipping during plays all throughout the game.
Example Output:
Atlanta Braves