Input: Transistor
Providing sufficient base drive current is a key problem in the use of bipolar transistors as switches. The transistor provides current gain, allowing a relatively large current in the collector to be switched by a much smaller current into the base terminal. The ratio of these currents varies depending on the type of transistor, and even for a particular type, varies depending on the collector current. In the example light-switch circuit shown, the resistor is chosen to provide enough base current to ensure the transistor will be saturated.

What is a major problem with using bipolar transistors as switches?
Output: Providing sufficient base drive current

Input: Capital punishment in the United States
Capital punishment was suspended in the United States from 1972 through 1976 primarily as a result of the Supreme Court's decision in Furman v. Georgia. The last pre-Furman execution was that of Luis Monge on June 2, 1967. In this case, the court found that the death penalty was being imposed in an unconstitutional manner, on the grounds of cruel and unusual punishment in violation of the Eighth Amendment to the United States Constitution. The Supreme Court has never ruled the death penalty to be per se unconstitutional.

In what year was the suspension of the death penalty in the United States ended?
Output: 1976

Input: Uranium
Uranium ore is mined in several ways: by open pit, underground, in-situ leaching, and borehole mining (see uranium mining). Low-grade uranium ore mined typically contains 0.01 to 0.25% uranium oxides. Extensive measures must be employed to extract the metal from its ore. High-grade ores found in Athabasca Basin deposits in Saskatchewan, Canada can contain up to 23% uranium oxides on average. Uranium ore is crushed and rendered into a fine powder and then leached with either an acid or alkali. The leachate is subjected to one of several sequences of precipitation, solvent extraction, and ion exchange. The resulting mixture, called yellowcake, contains at least 75% uranium oxides U3O8. Yellowcake is then calcined to remove impurities from the milling process before refining and conversion.

What is the average percentage of uranium oxide contained in the ores mined in the Athabasca Basin?
Output: 23%

Input: Namibia
The Namibian Constitution adopted in February 1990 incorporated protection for human rights, compensation for state expropriations of private property, an independent judiciary and an executive presidency (the constituent assembly became the national assembly). The country officially became independent on 21 March 1990. Sam Nujoma was sworn in as the first President of Namibia watched by Nelson Mandela (who had been released from prison the previous month) and representatives from 147 countries, including 20 heads of state. Walvis Bay was ceded to Namibia in 1994 upon the end of Apartheid in South Africa.[citation needed]

When was the Namibian Constitution adopted?
Output:
February 1990