Input: Arena Football League
In 2003, the season expanded to 16 games. There were also several rule changes in this period. In 2005, players were no longer allowed to run out of bounds. The only way for a player to go out of bounds presently is if he is tackled into or deliberately contacts the side boards. This was also the first year the ArenaBowl was played at a neutral site. In 2007, free substitution was allowed, ending the "iron man" era of one-platoon football. And in 2008, the "jack" linebacker was allowed to go sideboard to sideboard without being penalized for "illegal defense".

What year introduced the free substitution rule?
Output: 2007

Input: Article: The CIA established its first training facility, the Office of Training and Education, in 1950. Following the end of the Cold War, the CIA's training budget was slashed, which had a negative effect on employee retention. In response, Director of Central Intelligence George Tenet established CIA University in 2002. CIA University holds between 200 and 300 courses each year, training both new hires and experienced intelligence officers, as well as CIA support staff. The facility works in partnership with the National Intelligence University, and includes the Sherman Kent School for Intelligence Analysis, the Directorate of Analysis' component of the university.

Now answer this question: Who was the Director of Central Intelligence in 2002?

Output: George Tenet

Article: Furthermore, evidence exists that hunting may have been one of the multiple environmental factors leading to extinctions of the holocene megafauna and their replacement by smaller herbivores. North American megafauna extinction was coincidental with the Younger Dryas impact event, possibly making hunting a less critical factor in prehistoric species loss than had been previously thought. However, in other locations such as Australia, humans are thought to have played a very significant role in the extinction of the Australian megafauna that was widespread prior to human occupation.

Question: What is thought to have played a significant role in the extinction of the Australian megafauna?
Ans: humans

Here is a question about this article: Denial of service attacks are designed to make a machine or network resource unavailable to its intended users. Attackers can deny service to individual victims, such as by deliberately entering a wrong password enough consecutive times to cause the victim account to be locked, or they may overload the capabilities of a machine or network and block all users at once. While a network attack from a single IP address can be blocked by adding a new firewall rule, many forms of Distributed denial of service (DDoS) attacks are possible, where the attack comes from a large number of points and defending is much more difficult. Such attacks can originate from the zombie computers of a botnet, but a range of other techniques are possible including reflection and amplification attacks, where innocent systems are fooled into sending traffic to the victim.
What is the answer to this question: What are attacks designed to make a machine or network unavailable to its intended users?
****
So... Denial of service attacks

The problem: Answer a question about this article:
The two volume biography of Whitehead by Victor Lowe is the most definitive presentation of the life of Whitehead. However, many details of Whitehead's life remain obscure because he left no Nachlass; his family carried out his instructions that all of his papers be destroyed after his death. Additionally, Whitehead was known for his "almost fanatical belief in the right to privacy", and for writing very few personal letters of the kind that would help to gain insight on his life. This led to Lowe himself remarking on the first page of Whitehead's biography, "No professional biographer in his right mind would touch him."
What was Whitehead's wish upon his death for his family?
****
The answer: all of his papers be destroyed after his death.

The problem: Answer a question about this article:
New York City is home to the headquarters of the National Football League, Major League Baseball, the National Basketball Association, the National Hockey League, and Major League Soccer. The New York metropolitan area hosts the most sports teams in these five professional leagues. Participation in professional sports in the city predates all professional leagues, and the city has been continuously hosting professional sports since the birth of the Brooklyn Dodgers in 1882. The city has played host to over forty major professional teams in the five sports and their respective competing leagues, both current and historic. Four of the ten most expensive stadiums ever built worldwide (MetLife Stadium, the new Yankee Stadium, Madison Square Garden, and Citi Field) are located in the New York metropolitan area. Madison Square Garden, its predecessor, as well as the original Yankee Stadium and Ebbets Field, are some of the most famous sporting venues in the world, the latter two having been commemorated on U.S. postage stamps.
Which two sports stadiums of New York City were featured on US stamps?
****
The answer:
the original Yankee Stadium and Ebbets Field