Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
A person's self-report is the most reliable measure of pain, with health care professionals tending to underestimate severity. A definition of pain widely employed in nursing, emphasizing its subjective nature and the importance of believing patient reports, was introduced by Margo McCaffery in 1968: "Pain is whatever the experiencing person says it is, existing whenever he says it does". To assess intensity, the patient may be asked to locate their pain on a scale of 0 to 10, with 0 being no pain at all, and 10 the worst pain they have ever felt. Quality can be established by having the patient complete the McGill Pain Questionnaire indicating which words best describe their pain.
What is the most reliable measure of pain?
A: person's self-report

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In 2010, 6.9% of the population (1,269,765) considered themselves to be of only American ancestry (regardless of race or ethnicity). Many of these were of English or Scotch-Irish descent; however, their families have lived in the state for so long, that they choose to identify as having "American" ancestry or do not know their ancestry. In the 1980 United States census the largest ancestry group reported in Florida was English with 2,232,514 Floridians claiming that they were of English or mostly English American ancestry. Some of their ancestry went back to the original thirteen colonies.
French was the largest ancestry in Florida in what year?
A: unanswerable

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The central Sahara is estimated to include five hundred species of plants, which is extremely low considering the huge extent of the area. Plants such as acacia trees, palms, succulents, spiny shrubs, and grasses have adapted to the arid conditions, by growing lower to avoid water loss by strong winds, by storing water in their thick stems to use it in dry periods, by having long roots that travel horizontally to reach the maximum area of water and to find any surface moisture and by having small thick leaves or needles to prevent water loss by evapo-transpiration. Plant leaves may dry out totally and then recover.
what desert area has 500 species of animals?
A: unanswerable

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In November 2008, 720p HD support was added. At the time of the 720p launch, the YouTube player was changed from a 4:3 aspect ratio to a widescreen 16:9. With this new feature, YouTube began a switchover to H.264/MPEG-4 AVC as its default video compression format. In November 2009, 1080p HD support was added. In July 2010, YouTube announced that it had launched a range of videos in 4K format, which allows a resolution of up to 40963072 pixels. In June 2015, support for 8K resolution was added, with the videos playing at 76804320 pixels.
What was added in November 2015?
A:
unanswerable