instruction:
In this task, you are given a question and a context passage. You have to answer the question based on the given passage.
question:
How do you know that the main topic of discussion is not overall considered high power?, Context: LEDs have also been used as a medium-quality voltage reference in electronic circuits. The forward voltage drop (e.g. about 1.7 V for a normal red LED) can be used instead of a Zener diode in low-voltage regulators. Red LEDs have the flattest I/V curve above the knee. Nitride-based LEDs have a fairly steep I/V curve and are useless for this purpose. Although LED forward voltage is far more current-dependent than a Zener diode, Zener diodes with breakdown voltages below 3 V are not widely available.
answer:
LEDs have also been used as a medium-quality voltage


question:
What is the second distance given in the text in km, Context: The most dense rail network in Europe of 5,063 km (3,146 mi) carries over 350 million passengers annually. In 2007, each Swiss citizen travelled on average 2,258 km (1,403 mi) by rail, which makes them the keenest rail users. The network is administered mainly by the Federal Railways, except in Graubünden, where the 366 km (227 mi) narrow gauge railway is operated by the Rhaetian Railways and includes some World Heritage lines. The building of new railway base tunnels through the Alps is under way to reduce the time of travel between north and south through the AlpTransit project.
answer:
2,258 km


question:
How many games used to be in a season?, Context: The practice of playing one or two preseason exhibition games by each team before the start of the regular season was discontinued when the NBC contract was initiated, and the regular season was extended from 14 games, the length that it had been since 1996, to 16 from 2001 to 2010, and since 2016. From 2011 to 2015, the regular season league expanded to 18 games, with each team having two bye weeks and the option of two preseason games.
answer:

14