Given the task definition, example input & output, solve the new input case.
Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.
Example: In 1582 the united provinces invited francis, duke of anjou to lead them; but after a failed attempt to take antwerp in 1583, the duke left the netherlands again. after the assassination of william of orange (10 july 1584), both henry iii of france and elizabeth i of england declined the offer of sovereignty. however, the latter agreed to turn the united provinces into a protectorate of england (treaty of nonsuch, 1585), and sent the earl of leicester as governor-general. this was unsuccessful and in 1588 the provinces became a confederacy. the union of utrecht is regarded as the foundation of the republic of the seven united provinces, which was not recognized by the spanish empire until the peace of westphalia in 1648.
Output: In what year did francis, duke of anjou leave the netherlands?
The generated question is perfect. Because the question is based on second sentence of the input passage and its answer is 1583.

New input case for you: Experience the Colorado River the Hualapai Way! River Runners offers the ONLY One Day Whitewater trip ANYWHERE at the GRAND CANYOU! Since1973,Hualapai River Runners has been conducting whitewater rafting journey to the Colorado River. Our experienced guides expertly sail along the river and share the history of the Canyon and the Hualapai people with you. Visitors experience the excitement of whitewater rapids and then stop to enjoy the impressive beauty of Travertine Falls and a tasty lunch.No charge for children 2 years and under. One-Day Trip Retail$249.00+$79.00(helicopter and round-trip ground transportation) Whitewater rafting tours begin in Peach Springs.Hualapai River Runners transports you to Diamond Creek, which is the starting point for the 37 mile rafting tour. Lunch is included and upon arrival at the rafting tour termination point ,fly out of the Grand Canyon by helicopter to Grand Canyon West. Two-Day Trip Retail$549.00+$79.00(helicopter and round-trip ground transportation) Two-day rafting trips with one night on the Colorado River. All supplies and meals are included. Two days in the Grand Canyon,on the Colorado River allows more time to explore one of the Seven Wonders of the World. Tours Include: *Round-trip transportation from Peach Springs to the starting point and from the termination point back to Peach Springs. *Snack, drinks and lunch(vegetarian meals available upon request) *Waterproof dry bags for storing your cameras, sunscreen, dry clothes, etc. *The helicopter part of transportation is weather permitting. If the helicopter transportation is cancelled because of bad weather, the raft will continue an additional two hours to South Cove and a maximum $20.00 per customer will be given back. Special Website booking rate 15% off rafting in April 2010. So book now! Call us Toll Free Today! Tel: 1-888-868-9378
Output:
Where do whitewater rafting tours start?