Q: Extract the answer to the question from the following context. Question: What forced the retreat? Context: By 17 May, the main Austrian army under Charles had arrived on the Marchfeld. Charles kept the bulk of his troops several miles away from the river bank in hopes of concentrating them at the point where Napoleon decided to cross. On 21 May, the French made their first major effort to cross the Danube, precipitating the Battle of Aspern-Essling. The Austrians enjoyed a comfortable numerical superiority over the French throughout the battle; on the first day, Charles disposed of 110,000 soldiers against only 31,000 commanded by Napoleon. By the second day, reinforcements had boosted French numbers up to 70,000. The battle was characterized by a vicious back-and-forth struggle for the two villages of Aspern and Essling, the focal points of the French bridgehead. By the end of the fighting, the French had lost Aspern but still controlled Essling. A sustained Austrian artillery bombardment eventually convinced Napoleon to withdraw his forces back onto Lobau Island. Both sides inflicted about 23,000 casualties on each other. It was the first defeat Napoleon suffered in a major set-piece battle, and it caused excitement throughout many parts of Europe because it proved that he could be beaten on the battlefield.
A: A sustained Austrian artillery bombardment

Q: Extract the answer to the question from the following context. Question: Hayek learned psychology and? Context: In The Sensory Order: An Inquiry into the Foundations of Theoretical Psychology (1952), Hayek independently developed a "Hebbian learning" model of learning and memory an idea which he first conceived in 1920, prior to his study of economics. Hayek's expansion of the "Hebbian synapse" construction into a global brain theory has received continued attention in neuroscience, cognitive science, computer science, behavioural science, and evolutionary psychology, by scientists such as Gerald Edelman, and Joaquin Fuster.
A: economics

Q: Extract the answer to the question from the following context. Question: What film with a Spanish title portrays professional wrestlers as protagonists? Context: Many television shows and films have been produced which portray in-character professional wrestlers as protagonists, such as Ready to Rumble, Mucha Lucha!, Nacho Libre, and the Santo film series. In the wildly popular Rocky series of films about the fictional boxer Rocky Balboa, Rocky III saw its hero fighting a "boxer vs. wrestler" exhibition match against the enormous and villainous wrestler "Thunderlips", portrayed by real-life soon-to-be wrestling icon Hulk Hogan. At least two stage plays set in the world of pro wrestling have been produced: The Baron is a comedy that retells the life of an actual performer known as Baron von Raschke. From Parts Unknown... is an award-nominated Canadian drama about the rise and fall of a fictional wrestler. The 2009 South Park episode "W.T.F." played on the soap operatic elements of professional wrestling. One of the lead characters on the Disney Channel series Kim Possible was a huge fan of pro wrestling and actually featured it on an episode (with two former WWE wrestlers voicing the two fictitious wrestlers featured in the episode). The 2008 film The Wrestler, about a washed-up professional wrestler, garnered several Oscar nominations.
A: Mucha Lucha!

Q: Extract the answer to the question from the following context. Question: Which of the following is not the name of a body of water: Dnieper, spices, or Black Sea? Context: Relations between the Rus' and Byzantines became more complex after Oleg took control over Kiev, reflecting commercial, cultural, and military concerns. The wealth and income of the Rus' depended heavily upon trade with Byzantium. Constantine Porphyrogenitus described the annual course of the princes of Kiev, collecting tribute from client tribes, assembling the product into a flotilla of hundreds of boats, conducting them down the Dnieper to the Black Sea, and sailing to the estuary of the Dniester, the Danube delta, and on to Constantinople. On their return trip they would carry silk fabrics, spices, wine, and fruit. The importance of this trade relationship led to military action when disputes arose. The Primary Chronicle reports that the Rus' attacked Constantinople again in 907, probably to secure trade access. The Chronicle glorifies the military prowess and shrewdness of Oleg, an account imbued with legendary detail. Byzantine sources do not mention the attack, but a pair of treaties in 907 and 911 set forth a trade agreement with the Rus', the terms suggesting pressure on the Byzantines, who granted the Rus' quarters and supplies for their merchants and tax-free trading privileges in Constantinople.
A:
spices