Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Conventional bleaching of wood pulp using elemental chlorine produces and releases into the environment large amounts of chlorinated organic compounds, including chlorinated dioxins. Dioxins are recognized as a persistent environmental pollutant, regulated internationally by the Stockholm Convention on Persistent Organic Pollutants. Dioxins are highly toxic, and health effects on humans include reproductive, developmental, immune and hormonal problems. They are known to be carcinogenic. Over 90% of human exposure is through food, primarily meat, dairy, fish and shellfish, as dioxins accumulate in the food chain in the fatty tissue of animals.
How are humans uncommonly exposed to the byproducts of the bleaching process?
A: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Elizabeth's personal fortune has been the subject of speculation for many years. Jock Colville, who was her former private secretary and a director of her bank, Coutts, estimated her wealth in 1971 at 2 million (equivalent to about 25 million today). In 1993, Buckingham Palace called estimates of 100 million "grossly overstated". She inherited an estimated 70 million estate from her mother in 2002. The Sunday Times Rich List 2015 estimated her private wealth at 340 million, making her the 302nd richest person in the UK.
In what year did Jock Colville become Elizabeth's private secretary?
A: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The Tower has been inextricably linked with the Everton area since its construction in 1787. It was originally used as a bridewell to incarcerate mainly drunks and minor criminals, and it still stands today on Everton Brow in Netherfield Road. The tower was accompanied by two laurel wreaths on either side and, according to the College of Arms in London, Kelly chose to include the laurels as they were the sign of winners. The crest was accompanied by the club motto, "Nil Satis Nisi Optimum", meaning "Nothing but the best is good enough".
In what year did football first get played professionally in Everton?
A: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
In recent decades, the literacy rate of Rajasthan has increased significantly. In 1991, the state's literacy rate was only 38.55% (54.99% male and 20.44% female). In 2001, the literacy rate increased to 60.41% (75.70% male and 43.85% female). This was the highest leap in the percentage of literacy recorded in India (the rise in female literacy being 23%). At the Census 2011, Rajasthan had a literacy rate of 67.06% (80.51% male and 52.66% female). Although Rajasthan's literacy rate is below the national average of 74.04% and although its female literacy rate is the lowest in the country, the state has been praised for its efforts and achievements in raising male and female literacy rates.
In the 1991 census what was the female literacy rate?
A:
unanswerable