In 1854 president Antonio López de Santa Anna enlarged the area of the Federal District almost eightfold from the original 220 to 1,700 km2 (80 to 660 sq mi), annexing the rural and mountainous areas to secure the strategic mountain passes to the south and southwest to protect the city in event of a foreign invasion. (The Mexican–American War had just been fought.) The last changes to the limits of the Federal District were made between 1898 and 1902, reducing the area to the current 1,479 km2 (571 sq mi) by adjusting the southern border with the state of Morelos. By that time, the total number of municipalities within the Federal District was twenty-two.
When was the boundaries of the city last adjusted? 
1902


Input: Adolescence
Adolescence is also a time for rapid cognitive development. Piaget describes adolescence as the stage of life in which the individual's thoughts start taking more of an abstract form and the egocentric thoughts decrease. This allows the individual to think and reason in a wider perspective. A combination of behavioural and fMRI studies have demonstrated development of executive functions, that is, cognitive skills that enable the control and coordination of thoughts and behaviour, which are generally associated with the prefrontal cortex. The thoughts, ideas and concepts developed at this period of life greatly influence one's future life, playing a major role in character and personality formation.

What is another term for congitive skills that enable the control and coordination of thoughts and behavior?
Output: executive functions


Input: Article: The years following 2009 marked a shift in the structure of the "Big Four" with Tottenham Hotspur and Manchester City both breaking into the top four. In the 2009–10 season, Tottenham finished fourth and became the first team to break the top four since Everton in 2005. Criticism of the gap between an elite group of "super clubs" and the majority of the Premier League has continued, nevertheless, due to their increasing ability to spend more than the other Premier League clubs. Manchester City won the title in the 2011–12 season, becoming the first club outside the "Big Four" to win since 1994–95. That season also saw two of the Big Four (Chelsea and Liverpool) finish outside the top four places for the first time since 1994–95.

Now answer this question: Why was there critcism of the elite clubs?

Output: due to their increasing ability to spend more than the other Premier League clubs.


Article: On March 17, 1991, an all-Russian referendum created the post of President of the RSFSR. On June 12, Boris Yeltsin was elected President of Russia by popular vote. During an unsuccessful coup attempt on August 19–21, 1991 in Moscow, the capital of the Soviet Union and Russia, President of Russia Yeltsin strongly supported the President of the Soviet Union, Mikhail Gorbachev.

Question: Who was the first President of the RSFSR?
Ans: Boris Yeltsin


Here is a question about this article: On 12 March 1999, the Czech Republic, Hungary, and Poland joined NATO; Bulgaria, Estonia, Latvia, Lithuania, Romania, and Slovakia joined in March 2004; Albania joined on 1 April 2009.
What is the answer to this question: In which year did Poland join NATO?
****
So... 1999


Article: In the United States, heating, ventilation and air conditioning (HVAC) systems account for 30% (4.65 EJ/yr) of the energy used in commercial buildings and nearly 50% (10.1 EJ/yr) of the energy used in residential buildings. Solar heating, cooling and ventilation technologies can be used to offset a portion of this energy.

Question: How much energy does an HVAC system use in commercial locations?
Ans:
30% (4.65 EJ/yr)