The problem: Answer a question about this article:
Feathers require maintenance and birds preen or groom them daily, spending an average of around 9% of their daily time on this. The bill is used to brush away foreign particles and to apply waxy secretions from the uropygial gland; these secretions protect the feathers' flexibility and act as an antimicrobial agent, inhibiting the growth of feather-degrading bacteria. This may be supplemented with the secretions of formic acid from ants, which birds receive through a behaviour known as anting, to remove feather parasites.
What do birds use to brush away foreign particles?
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The answer: The bill


The problem: Answer a question about this article:
In 1994, responding to the need for a more useful system for describing chronic pain, the International Association for the Study of Pain (IASP) classified pain according to specific characteristics: (1) region of the body involved (e.g. abdomen, lower limbs), (2) system whose dysfunction may be causing the pain (e.g., nervous, gastrointestinal), (3) duration and pattern of occurrence, (4) intensity and time since onset, and (5) etiology. However, this system has been criticized by Clifford J. Woolf and others as inadequate for guiding research and treatment. Woolf suggests three classes of pain : (1) nociceptive pain, (2) inflammatory pain which is associated with tissue damage and the infiltration of immune cells, and (3) pathological pain which is a disease state caused by damage to the nervous system or by its abnormal function (e.g. fibromyalgia, irritable bowel syndrome, tension type headache, etc.).
What do some people feel the IASP's system is inadequate for?
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The answer: guiding research and treatment


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Pelayos' plan was to use the Cantabrian mountains as a place of refuge and protection from the invading Moors. He then aimed to regroup the Iberian Peninsula's Christian armies and use the Cantabrian mountains as a springboard from which to regain their lands from the Moors. In the process, after defeating the Moors in the Battle of Covadonga in 722 AD, Pelayos was proclaimed king, thus founding the Christian Kingdom of Asturias and starting the war of Christian reconquest known in Portuguese as the Reconquista Cristã.
Against which group of people was Pelayos fighting?
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The answer: Moors


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The earliest known human activity on the island dates to around the 10th millennium BC. Archaeological remains from this period include the well-preserved Neolithic village of Khirokitia, and Cyprus is home to some of the oldest water wells in the world. Cyprus was settled by Mycenaean Greeks in two waves in the 2nd millennium BC. As a strategic location in the Middle East, it was subsequently occupied by several major powers, including the empires of the Assyrians, Egyptians and Persians, from whom the island was seized in 333 BC by Alexander the Great. Subsequent rule by Ptolemaic Egypt, the Classical and Eastern Roman Empire, Arab caliphates for a short period, the French Lusignan dynasty and the Venetians, was followed by over three centuries of Ottoman rule between 1571 and 1878 (de jure until 1914).
What empires have occupied Cyprus?
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The answer:
empires of the Assyrians, Egyptians and Persians