Problem: Film speed:

The DIN system, officially DIN standard 4512 by Deutsches Institut für Normung (but still named Deutscher Normenausschuß (DNA) at this time), was published in January 1934. It grew out of drafts for a standardized method of sensitometry put forward by Deutscher Normenausschuß für Phototechnik as proposed by the committee for sensitometry of the Deutsche Gesellschaft für photographische Forschung since 1930 and presented by Robert Luther (de) (1868–1945) and Emanuel Goldberg (1881–1970) at the influential VIII. International Congress of Photography (German: Internationaler Kongreß für wissenschaftliche und angewandte Photographie) held in Dresden from August 3 to 8, 1931.

Where was Emanuel Goldberg from?
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A: unanswerable


Problem: NARA also maintains the Presidential Library system, a nationwide network of libraries for preserving and making available the documents of U.S. presidents since Herbert Hoover. The Presidential Libraries include:
What agency maintains the Presidential Library system?
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Answer: NARA


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
By the 20th century, Philadelphia had become known as "corrupt and contented", with a complacent population and an entrenched Republican political machine. The first major reform came in 1917 when outrage over the election-year murder of a police officer led to the shrinking of the Philadelphia City Council from two houses to just one. In July 1919, Philadelphia was one of more than 36 industrial cities nationally to suffer a race riot of ethnic whites against blacks during Red Summer, in post-World War I unrest, as recent immigrants competed with blacks for jobs. In the 1920s, the public flouting of Prohibition laws, mob violence, and police involvement in illegal activities led to the appointment of Brigadier General Smedley Butler of the U.S. Marine Corps as director of public safety, but political pressure prevented any long-term success in fighting crime and corruption.
When did the first major political reform occur?
A: 1917


Context and question: Theologus Autodidactus, written by the Arabian polymath Ibn al-Nafis (1213–1288), is the first example of a science fiction novel. It deals with various science fiction elements such as spontaneous generation, futurology, the end of the world and doomsday, resurrection, and the afterlife. Rather than giving supernatural or mythological explanations for these events, Ibn al-Nafis attempted to explain these plot elements using the scientific knowledge of biology, astronomy, cosmology and geology known in his time. Ibn al-Nafis' fiction explained Islamic religious teachings via science and Islamic philosophy.
What did Ibn al-Nafis write in the 12th century?
Answer: unanswerable


Question: Protestants also took the initiative in advocating for religious freedom. Freedom of conscience had high priority on the theological, philosophical, and political agendas since Luther refused to recant his beliefs before the Diet of the Holy Roman Empire at Worms (1521). In his view, faith was a free work of the Holy Spirit and could, therefore, not be forced on a person. The persecuted Anabaptists and Huguenots demanded freedom of conscience, and they practised separation of church and state. In the early seventeenth century, Baptists like John Smyth and Thomas Helwys published tracts in defense of religious freedom. Their thinking influenced John Milton and John Locke's stance on tolerance. Under the leadership of Baptist Roger Williams, Congregationalist Thomas Hooker, and Quaker William Penn, respectively, Rhode Island, Connecticut, and Pennsylvania combined democratic constitutions with freedom of religion. These colonies became safe havens for persecuted religious minorities, including Jews. The United States Declaration of Independence, the United States Constitution, and the American Bill of Rights with its fundamental human rights made this tradition permanent by giving it a legal and political framework. The great majority of American Protestants, both clergy and laity, strongly supported the independence movement. All major Protestant churches were represented in the First and Second Continental Congresses. In the nineteenth and twentieth centuries, the American democracy became a model for numerous other countries and regions throughout the world (e.g., Latin America, Japan, and Germany). The strongest link between the American and French Revolutions was Marquis de Lafayette, an ardent supporter of the American constitutional principles. The French Declaration of the Rights of Man and of the Citizen was mainly based on Lafayette's draft of this document. The United Nations Declaration and Universal Declaration of Human Rights also echo the American constitutional tradition.
Is there an answer to this question: What group initiated the right to religious freedom?

Answer: Protestants


On 22 May 2015, Sun reporter Anthony France was found guilty of aiding and abetting misconduct in a public office between 2008 and 2011. France’s trial followed the London Metropolitan Police's Operation Elveden, an ongoing investigation into alleged payments to police and officials in exchange for information. He had paid a total of more than £22,000 to PC Timothy Edwards, an anti-terrorism police officer based at Heathrow Airport. The police officer had already pleaded guilty to misconduct in a public office and given a two-year gaol sentence in 2014, but the jury in France’s trial was not informed of this. Following the passing of the guilty verdict, the officer leading Operation Elveden, Detective Chief Superintendent Gordon Briggs said France and Edwards had been in a "long-term, corrupt relationship".
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Who was the policeman leading Operation Elveden?
Ah, so..
Detective Chief Superintendent Gordon Briggs