This task is about writing a correct answer for the reading comprehension task. Based on the information provided in a given passage, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.

[Q]: Passage: In the mid-18th century, Paris became the center of an explosion of philosophic and scientific activity challenging traditional doctrines and dogmas. The philosophic movement was led by Voltaire and Jean-Jacques Rousseau, who argued for a society based upon reason rather than faith and Catholic doctrine, for a new civil order based on natural law, and for science based on experiments and observation. The political philosopher Montesquieu introduced the idea of a separation of powers in a government, a concept which was enthusiastically adopted by the authors of the United States Constitution. While the Philosophes of the French Enlightenment were not revolutionaries, and many were members of the nobility, their ideas played an important part in undermining the legitimacy of the Old Regime and shaping the French Revolution. Question: Which philosopher introduced the idea of a separation of powers in government?
[A]: Montesquieu


[Q]: Passage: According to Sun Jiadong, the chief designer of the navigation system, "Many organizations have been using our system for a while, and they like it very much." Question: What did Sun Jiadong have to say about the BeiDou navigation system?
[A]: "Many organizations have been using our system for a while, and they like it very much."


[Q]: Passage: This makes for a large number of takeoffs and landings and it is not unusual for flights to be delayed in the holding pattern before landing. Following the airport's master plan, Infraero built a second runway, which was finished in 2006. In 2007, the airport handled 11,119,872 passengers. The main building's third floor, with 12 thousand square meters, has a panoramic deck, a food court, shops, four movie theatres with total capacity of 500 people, and space for exhibitions. Brasília Airport has 136 vendor spaces. The airport is located about 11 km (6.8 mi) from the central area of Brasília, outside the metro system. The area outside the airport's main gate is lined with taxis as well as several bus line services which connect the airport to Brasília's central district. The parking lot accommodates 1,200 cars. The airport is serviced by domestic and regional airlines (TAM, GOL, Azul, WebJET, Trip and Avianca), in addition to a number of international carriers. In 2012, Brasília's International Airport was won by the InfrAmerica consortium, formed by the Brazilian engineering company ENGEVIX and the Argentine Corporacion America holding company, with a 50% stake each. During the 25-year concession, the airport may be expanded to up to 40 million passengers a year. Question: When did Brasilia's airport add a second runway?
[A]:
2006