Input: Article: In a series of famous papers, von Neumann made spectacular contributions to measure theory. The work of Banach had implied that the problem of measure has a positive solution if n = 1 or n = 2 and a negative solution in all other cases. Von Neumann's work argued that the "problem is essentially group-theoretic in character, and that, in particular, for the solvability of the problem of measure the ordinary algebraic concept of solvability of a group is relevant. Thus, according to von Neumann, it is the change of group that makes a difference, not the change of space."

Now answer this question: According to von Neumann what is the most important part of the problem of measure?

Output: change of group that makes a difference, not the change of space

Article: In the early 21st century, Republican voters control most of the state, especially in the more rural and suburban areas outside of the cities; Democratic strength is mostly confined to the urban cores of the four major cities, and is particularly strong in the cities of Nashville and Memphis. The latter area includes a large African-American population. Historically, Republicans had their greatest strength in East Tennessee before the 1960s. Tennessee's 1st and 2nd congressional districts, based in the Tri-Cities and Knoxville, respectively, are among the few historically Republican districts in the South. Those districts' residents supported the Union over the Confederacy during the Civil War; they identified with the GOP after the war and have stayed with that party ever since. The 1st has been in Republican hands continuously since 1881, and Republicans (or their antecedents) have held it for all but four years since 1859. The 2nd has been held continuously by Republicans or their antecedents since 1859.

Question: Which Tennessee city has the largest African-American population?
Ans: Memphis

Here is a question about this article: Defensive Counterair (DCA) is defined as "all the defensive measures designed to detect, identify, intercept, and destroy or negate enemy forces attempting to penetrate or attack through friendly airspace" (JP 1-02). A major goal of DCA operations, in concert with OCA operations, is to provide an area from which forces can operate, secure from air and missile threats. The DCA mission comprises both active and passive defense measures. Active defense is "the employment of limited offensive action and counterattacks to deny a contested area or position to the enemy" (JP 1-02). It includes both ballistic missile defense and air breathing threat defense, and encompasses point defense, area defense, and high value airborne asset defense. Passive defense is "measures taken to reduce the probability of and to minimize the effects of damage caused by hostile action without the intention of taking the initiative" (JP 1-02). It includes detection and warning; chemical, biological, radiological, and nuclear defense; camouflage, concealment, and deception; hardening; reconstitution; dispersion; redundancy; and mobility, counter-measures, and stealth.
What is the answer to this question: What sort of airspace is the DCA designed to protect?
****
So... friendly

The problem: Answer a question about this article:
Under a front page headline "The Truth", the paper printed allegations provided to them that some fans picked the pockets of crushed victims, that others urinated on members of the emergency services as they tried to help and that some even assaulted a police constable "whilst he was administering the kiss of life to a patient." Despite the headline, written by Kelvin MacKenzie, the story was based on allegations either by unnamed and unattributable sources, or hearsay accounts of what named individuals had said a fact made clear to MacKenzie by Harry Arnold, the reporter who wrote the story.
What was the story based on?
****
The answer: allegations either by unnamed and unattributable sources, or hearsay accounts of what named individuals had said

Problem: Please answer a question about the following article about Institute of technology:
In higher education, Politecnico refers to a technical university awarding degrees in engineering. Historically there were two Politecnici, one in each of the two largest industrial cities of the north:
What term in higher education refers to technical universities that award engineering degrees?
A: Politecnico

Question: Read this and answer the question

After years of demanding greater political autonomy, residents were given the right to directly elect a Head of Government and the representatives of the unicameral Legislative Assembly by popular vote in 1997. Ever since, the left-wing Party of the Democratic Revolution (PRD) has controlled both of them. In recent years, the local government has passed a wave of liberal policies, such as abortion on request, a limited form of euthanasia, no-fault divorce, and same-sex marriage. On January 29, 2016, it ceased to be called the Federal District (Spanish: Distrito Federal or D.F.) and is now in transition to become the country's 32nd federal entity, giving it a level of autonomy comparable to that of a state. Because of a clause in the Mexican Constitution, however, as the seat of the powers of the Union, it can never become a state, lest the capital of the country be relocated elsewhere.

When did people become able to vote for representation?
Answer:
1997