Extract the answer to the question from the following context. Question: If you need a low slope, what do you use? 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: Red LEDs


Extract the answer to the question from the following context. 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


Extract the answer to the question from the following context. Question: Which is not a last name, Hurd or Vindication? Context: Richard Hurd believed that Burke's imitation was near-perfect and that this defeated his purpose: an ironist "should take care by a constant exaggeration to make the ridicule shine through the Imitation. Whereas this Vindication is everywhere enforc'd, not only in the language, and on the principles of L. Bol., but with so apparent, or rather so real an earnestness, that half his purpose is sacrificed to the other". A minority of scholars have taken the position that, in fact, Burke did write the Vindication in earnest, later disowning it only for political reasons.
----
Answer:
Vindication