Problem: Compact disc:

CD-R recordings are designed to be permanent. Over time, the dye's physical characteristics may change causing read errors and data loss until the reading device cannot recover with error correction methods. The design life is from 20 to 100 years, depending on the quality of the discs, the quality of the writing drive, and storage conditions. However, testing has demonstrated such degradation of some discs in as little as 18 months under normal storage conditions. This failure is known as disc rot, for which there are several, mostly environmental, reasons.

What can the aluminium on a disc cause reading errors?
---
A: unanswerable

Problem: Dell:

In July 2009, Dell apologized after drawing the ire of the Taiwanese Consumer Protection Commission for twice refusing to honour a flood of orders against unusually low prices offered on its Taiwanese website. In the first instance, Dell offered a 19" LCD panel for $15. In the second instance, Dell offered its Latitude E4300 notebook at NT$18,558 (US$580), 70% lower than usual price of NT$60,900 (US$1900). Concerning the E4300, rather than honour the discount taking a significant loss, the firm withdrew orders and offered a voucher of up to NT$20,000 (US$625) a customer in compensation. The consumer rights authorities in Taiwan fined Dell NT$1 million (US$31250) for customer rights infringements. Many consumers sued the firm for the unfair compensation. A court in southern Taiwan ordered the firm to deliver 18 laptops and 76 flat-panel monitors to 31 consumers for NT$490,000 (US$15,120), less than a third of the normal price. The court said the event could hardly be regarded as mistakes, as the prestigious firm said the company mispriced its products twice in Taiwanese website within 3 weeks.

How much did Taiwan fine Dell for its practices?
---
A: NT$1 million

Problem: Nutrition:

In 1896, Eugen Baumann observed iodine in thyroid glands. In 1897, Christiaan Eijkman worked with natives of Java, who also suffered from beriberi. Eijkman observed that chickens fed the native diet of white rice developed the symptoms of beriberi but remained healthy when fed unprocessed brown rice with the outer bran intact. Eijkman cured the natives by feeding them brown rice, discovering that food can cure disease. Over two decades later, nutritionists learned that the outer rice bran contains vitamin B1, also known as thiamine.

How long after the natives were cured did it take for people to figure out the reason that brown rice cured them?
---
A: two decades

Problem: Russian language:

During the Soviet period, the policy toward the languages of the various other ethnic groups fluctuated in practice. Though each of the constituent republics had its own official language, the unifying role and superior status was reserved for Russian, although it was declared the official language only in 1990. Following the break-up of the USSR in 1991, several of the newly independent states have encouraged their native languages, which has partly reversed the privileged status of Russian, though its role as the language of post-Soviet national discourse throughout the region has continued.

What unofficial status did Russian have in the USSR before 1990?
---
A:
the unifying role and superior status