Problem: Data compression:

Compression is useful because it helps reduce resource usage, such as data storage space or transmission capacity. Because compressed data must be decompressed to use, this extra processing imposes computational or other costs through decompression; this situation is far from being a free lunch. Data compression is subject to a space–time complexity trade-off. For instance, a compression scheme for video may require expensive hardware for the video to be decompressed fast enough to be viewed as it is being decompressed, and the option to decompress the video in full before watching it may be inconvenient or require additional storage. The design of data compression schemes involves trade-offs among various factors, including the degree of compression, the amount of distortion introduced (when using lossy data compression), and the computational resources required to compress and decompress the data.

What must compressed data be to be inconvenient?
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A: unanswerable


Problem: Elizabeth and Philip were married on 20 November 1947 at Westminster Abbey. They received 2500 wedding gifts from around the world. Because Britain had not yet completely recovered from the devastation of the war, Elizabeth required ration coupons to buy the material for her gown, which was designed by Norman Hartnell. In post-war Britain, it was not acceptable for the Duke of Edinburgh's German relations, including his three surviving sisters, to be invited to the wedding. The Duke of Windsor, formerly King Edward VIII, was not invited either.
In what year did King Edward VIII abdicate the throne?
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Answer: unanswerable


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Before the 1997 war, about 9,000 Europeans and other non-Africans lived in Congo, most of whom were French; only a fraction of this number remains. Around 300 American expatriates reside in the Congo.
Prior to the civil war in '97, how many non-Africans lived in the Republic of the Congo?
A: about 9,000


Context and question: The initial prototype shown in May 2005 featured two HDMI ports, three Ethernet ports and six USB ports; however, when the system was shown again a year later at E3 2006, these were reduced to one HDMI port, one Ethernet port and four USB ports, presumably to cut costs. Two hardware configurations were also announced for the console: a 20 GB model and a 60 GB model, priced at US$499 (€499) and US$599 (€599), respectively. The 60 GB model was to be the only configuration to feature an HDMI port, Wi-Fi internet, flash card readers and a chrome trim with the logo in silver. Both models were announced for a simultaneous worldwide release: November 11, 2006, for Japan and November 17, 2006, for North America and Europe.
How many USB ports did the original PS2 prototype have?
Answer: unanswerable


Question: The presence of pain in an animal cannot be known for certain, but it can be inferred through physical and behavioral reactions. Specialists currently believe that all vertebrates can feel pain, and that certain invertebrates, like the octopus, might too. As for other animals, plants, or other entities, their ability to feel physical pain is at present a question beyond scientific reach, since no mechanism is known by which they could have such a feeling. In particular, there are no known nociceptors in groups such as plants, fungi, and most insects, except for instance in fruit flies.
Is there an answer to this question: What do specialists say all invertebrates can feel?

Answer: unanswerable


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The term middle east as a noun and adjective was common in the 19th century in nearly every context except diplomacy and archaeology. An uncountable number of places appear to have had their middle easts from gardens to regions, including the United States. The innovation of the term "Near East" to mean the holdings of the Ottoman Empire as early as the Crimean War had left a geographical gap. The East Indies, or "Far East," derived ultimately from Ptolemy's "India Beyond the Ganges." The Ottoman Empire ended at the eastern border of Iraq. "India This Side of the Ganges" and Iran had been omitted. The archaeologists counted Iran as "the Near East" because Old Persian cuneiform had been found there. This usage did not sit well with the diplomats; India was left in an equivocal state. They needed a regional term.
Why did archaeologists count Iran as "The Near East"?
A:
because Old Persian cuneiform had been found there