Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
With crude oil as the country's primary export, Gaddafi sought to improve Libya's oil sector. In October 1969, he proclaimed the current trade terms unfair, benefiting foreign corporations more than the Libyan state, and by threatening to reduce production, in December Jalloud successfully increased the price of Libyan oil. In 1970, other OPEC states followed suit, leading to a global increase in the price of crude oil. The RCC followed with the Tripoli Agreement, in which they secured income tax, back-payments and better pricing from the oil corporations; these measures brought Libya an estimated $1 billion in additional revenues in its first year.
How did Gaddafi's decisions in the oil industry impact other OPEC states?
A: In 1970, other OPEC states followed suit, leading to a global increase in the price of crude oil.

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
In 2009 Tajikistan had 26 airports, 18 of which had paved runways, of which two had runways longer than 3,000 meters. The country's main airport is Dushanbe International Airport which as of April 2015, had regularly scheduled flights to major cities in Russia, Central Asia, as well as Delhi, Dubai, Frankfurt, Istanbul, Kabul, Tehran, and Urumqi amongst others. There are also international flights, mainly to Russia, from Khujand Airport in the northern part of the country as well as limited international services from Kulob Airport, and Qurghonteppa International Airport. Khorog Airport is a domestic airport and also the only airport in the sparsely populated eastern half of the country.
In 2019, Tajikistan had how many airports?
A: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Large brushes are desired for a larger brush contact area to maximize motor output, but small brushes are desired for low mass to maximize the speed at which the motor can run without the brushes excessively bouncing and sparking. (Small brushes are also desirable for lower cost.) Stiffer brush springs can also be used to make brushes of a given mass work at a higher speed, but at the cost of greater friction losses (lower efficiency) and accelerated brush and commutator wear. Therefore, DC motor brush design entails a trade-off between output power, speed, and efficiency/wear.
Besides wear, what is a downside of stiff brush springs?
A: lower efficiency

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The first documented visit by a European was in 1524 by Giovanni da Verrazzano, a Florentine explorer in the service of the French crown, who sailed his ship La Dauphine into New York Harbor. He claimed the area for France and named it "Nouvelle Angouleme" (New Angouleme).
What nation did Giovanni da Verrazzano serve?
A:
France