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.

Input: Consider Input: Passage: By August 1805, Napoleon had realized that the strategic situation had changed fundamentally. Facing a potential invasion from his continental enemies, he decided to strike first and turned his army's sights from the English Channel to the Rhine. His basic objective was to destroy the isolated Austrian armies in Southern Germany before their Russian allies could arrive. On 25 September, after great secrecy and feverish marching, 200,000 French troops began to cross the Rhine on a front of 260 km (160 mi). Austrian commander Karl Mack had gathered the greater part of the Austrian army at the fortress of Ulm in Swabia. Napoleon swung his forces to the southeast and the Grande Armée performed an elaborate wheeling movement that outflanked the Austrian positions. The Ulm Maneuver completely surprised General Mack, who belatedly understood that his army had been cut off. After some minor engagements that culminated in the Battle of Ulm, Mack finally surrendered after realizing that there was no way to break out of the French encirclement. For just 2000 French casualties, Napoleon had managed to capture a total of 60,000 Austrian soldiers through his army's rapid marching. The Ulm Campaign is generally regarded as a strategic masterpiece and was influential in the development of the Schlieffen Plan in the late 19th century. For the French, this spectacular victory on land was soured by the decisive victory that the Royal Navy attained at the Battle of Trafalgar on 21 October. After Trafalgar, Britain had total domination of the seas for the duration of the Napoleonic Wars. Question: By August 1805, Napoleon changed the primary target of his army's efforts from the English Channel to what area?

Output: the Rhine


Input: Consider Input: Passage: At present the A35 autoroute, which parallels the Rhine between Karlsruhe and Basel, and the A4 autoroute, which links Paris with Strasbourg, penetrate close to the centre of the city. The Grand contournement ouest (GCO) project, programmed since 1999, plans to construct a 24 km (15 mi) long highway connection between the junctions of the A4 and the A35 autoroutes in the north and of the A35 and A352 autoroutes in the south. This routes well to the west of the city and is meant to divest a significant portion of motorized traffic from the unité urbaine. Question: How far is the connection between junctions A4 and the A35?

Output: 24 km


Input: Consider Input: Passage: UCLA professor Richard H. Sander published an article in the November 2004 issue of the Stanford Law Review that questioned the effectiveness of racial preferences in law schools. He noted that, prior to his article, there had been no comprehensive study on the effects of affirmative action. The article presents a study that shows that half of all black law students rank near the bottom of their class after the first year of law school and that black law students are more likely to drop out of law school and to fail the bar exam. The article offers a tentative estimate that the production of new black lawyers in the United States would grow by eight percent if affirmative action programs at all law schools were ended. Less qualified black students would attend less prestigious schools where they would be more closely matched in abilities with their classmates and thus perform relatively better. Sander helped to develop a socioeconomically-based affirmative action plan for the UCLA School of Law after the passage of Proposition 209 in 1996, which prohibited the use of racial preferences by public universities in California. This change occurred after studies showed that the graduation rate of blacks at UCLA was 41%, compared to 73% for whites. Question: What did Sander's study show in terms of black law students rankings?


Output: half of all black law students rank near the bottom of their class after the first year of law school