Problem: Race (human categorization):

Basically, race in Brazil was "biologized", but in a way that recognized the difference between ancestry (which determines genotype) and phenotypic differences. There, racial identity was not governed by rigid descent rule, such as the one-drop rule, as it was in the United States. A Brazilian child was never automatically identified with the racial type of one or both parents, nor were there only a very limited number of categories to choose from, to the extent that full siblings can pertain to different racial groups.

What were Brazillian children never automatically identified with the type of?
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A: racial

Problem: The scientific evidence is mixed as to whether companionship of a dog can enhance human physical health and psychological wellbeing. Studies suggesting that there are benefits to physical health and psychological wellbeing have been criticised for being poorly controlled, and finding that "[t]he health of elderly people is related to their health habits and social supports but not to their ownership of, or attachment to, a companion animal." Earlier studies have shown that people who keep pet dogs or cats exhibit better mental and physical health than those who do not, making fewer visits to the doctor and being less likely to be on medication than non-guardians.
Studies that people are better off with dogs have been criticized for being what?
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Answer: poorly controlled

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The earliest extant samples of connected (north) Estonian are the so-called Kullamaa prayers dating from 1524 and 1528. In 1525 the first book published in the Estonian language was printed. The book was a Lutheran manuscript, which never reached the reader and was destroyed immediately after publication.
What manuscript was written in 1528?
A: unanswerable

Context and question: In 1838 with the amount of smuggled opium entering China approaching 1,400 tons a year, the Chinese imposed a death penalty for opium smuggling and sent a Special Imperial Commissioner, Lin Zexu, to curb smuggling. This resulted in the First Opium War (183942). After the war Hong Kong island was ceded to Britain under the Treaty of Nanking and the Chinese market opened to the opium traders of Britain and other nations. The Jardines and Apcar and Company dominated the trade, although P&O also tried to take a share. A Second Opium War fought by Britain and France against China lasted from 1856 until 1860 and led to the Treaty of Tientsin, which legalised the importation of opium. Legalisation stimulated domestic Chinese opium production and increased the importation of opium from Turkey and Persia. This increased competition for the Chinese market led to India reducing its opium output and diversifying its exports.
When did the only Opium war end?
Answer: unanswerable

Question: The first high-brightness blue LED was demonstrated by Shuji Nakamura of Nichia Corporation in 1994 and was based on InGaN. In parallel, Isamu Akasaki and Hiroshi Amano in Nagoya were working on developing the important GaN nucleation on sapphire substrates and the demonstration of p-type doping of GaN. Nakamura, Akasaki and Amano were awarded the 2014 Nobel prize in physics for their work. In 1995, Alberto Barbieri at the Cardiff University Laboratory (GB) investigated the efficiency and reliability of high-brightness LEDs and demonstrated a "transparent contact" LED using indium tin oxide (ITO) on (AlGaInP/GaAs).
Is there an answer to this question: What color LED was demonstrated in 1994?

Answer: blue

The University of Kansas Medical Center features three schools: the School of Medicine, School of Nursing, and School of Health Professions. Furthermore, each of the three schools has its own programs of graduate study. As of the Fall 2013 semester, there were 3,349 students enrolled at KU Med. The Medical Center also offers four year instruction at the Wichita campus, and features a medical school campus in Salina, Kansas that is devoted to rural health care.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What does each of the component schools of KU's Medical Center offer?
Ah, so..
its own programs of graduate study