The problem: Answer a question about this article:
The Arctic tern holds the long-distance migration record for birds, travelling between Arctic breeding grounds and the Antarctic each year. Some species of tubenoses (Procellariiformes) such as albatrosses circle the earth, flying over the southern oceans, while others such as Manx shearwaters migrate 14,000 km (8,700 mi) between their northern breeding grounds and the southern ocean. Shorter migrations are common, including altitudinal migrations on mountains such as the Andes and Himalayas.
What is an example of a shorter migration?
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The answer: altitudinal migrations on mountains such as the Andes and Himalayas

The problem: Answer a question about this article:
Even though the Gelug exchanged gifts with and sent missions to the Ming court up until the 1430s, the Gelug was not mentioned in the Mingshi or the Mingshi Lu. On this, historian Li Tieh-tseng says of Tsongkhapa's refusal of Ming invitations to visit the Yongle Emperor's court:
Until what year frame did the Gelug exchange gifts with the the Ming?
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The answer: 1430s

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The assumption that black-body radiation is thermal leads to an accurate prediction: the total amount of emitted energy goes up with the temperature according to a definite rule, the StefanBoltzmann law (187984). But it was also known that the colour of the light given off by a hot object changes with the temperature, so that "white hot" is hotter than "red hot". Nevertheless, Wilhelm Wien discovered the mathematical relationship between the peaks of the curves at different temperatures, by using the principle of adiabatic invariance. At each different temperature, the curve is moved over by Wien's displacement law (1893). Wien also proposed an approximation for the spectrum of the object, which was correct at high frequencies (short wavelength) but not at low frequencies (long wavelength). It still was not clear why the spectrum of a hot object had the form that it has (see diagram).
What did Wilhelm Wien discover?
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The answer: the mathematical relationship between the peaks of the curves at different temperatures

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The first truth explains the nature of dukkha. Dukkha is commonly translated as "suffering", "anxiety", "unsatisfactoriness", "unease", etc., and it is said to have the following three aspects:
What is Dukkha?
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The answer:
"suffering", "anxiety", "unsatisfactoriness", "unease", etc.