Input: Read this: In the last years of the nineteenth century, Planck was investigating the problem of black-body radiation first posed by Kirchhoff some forty years earlier. It is well known that hot objects glow, and that hotter objects glow brighter than cooler ones. The electromagnetic field obeys laws of motion similarly to a mass on a spring, and can come to thermal equilibrium with hot atoms. The hot object in equilibrium with light absorbs just as much light as it emits. If the object is black, meaning it absorbs all the light that hits it, then its thermal light emission is maximized.
Question: If an object is black, what is known about its thermal light emission?

Output: its thermal light emission is maximized.

Input: Read this: Of the 10 most populous U.S. cities, Houston has the most total area of parks and green space, 56,405 acres (228 km2). The city also has over 200 additional green spacestotaling over 19,600 acres (79 km2) that are managed by the cityincluding the Houston Arboretum and Nature Center. The Lee and Joe Jamail Skatepark is a public skatepark owned and operated by the city of Houston, and is one of the largest skateparks in Texas consisting of 30,000 (2,800 m2) square foot in-ground facility. The Gerald D. Hines Waterwall Parklocated in the Uptown District of the cityserves as a popular tourist attraction, weddings, and various celebrations. A 2011 study by Walk Score ranked Houston the 23rd most walkable of the 50 largest cities in the United States. Wet'n'Wild SplashTown is a water park located north of Houston.
Question: What does Houston have the most of compared to other large UK cities?

Output: unanswerable

Input: Read this: The FBI's chief tool against organized crime is the Racketeer Influenced and Corrupt Organizations (RICO) Act. The FBI is also charged with the responsibility of enforcing compliance of the United States Civil Rights Act of 1964 and investigating violations of the act in addition to prosecuting such violations with the United States Department of Justice (DOJ). The FBI also shares concurrent jurisdiction with the Drug Enforcement Administration (DEA) in the enforcement of the Controlled Substances Act of 1970.
Question: What Substance act does the FBI enforce?

Output: Controlled Substances Act of 1970

Input: Read this: The Portuguese currency is the euro (), which replaced the Portuguese Escudo, and the country was one of the original member states of the eurozone. Portugal's central bank is the Banco de Portugal, an integral part of the European System of Central Banks. Most industries, businesses and financial institutions are concentrated in the Lisbon and Porto metropolitan areasthe Setubal, Aveiro, Braga, Coimbra and Leiria districts are the biggest economic centres outside these two main areas.[citation needed] According to World Travel Awards, Portugal is the Europe's Leading Golf Destination 2012 and 2013.
Question: According to World Travel Awards, for what activity is Portugal known as Europe's leading destination?

Output:
Golf