You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
In this task, you're given a question, along with a context passage which has extra information available on certain terms mentioned in it. Your job is to determine which sentence(s) from the passage can be used to search for further information needed to answer the question.

Question: When did the operation during which the 704th dropped supplies to allied troops near Nijmegen begin? Passage: The group was occasionally diverted from strategic missions to carry out air support and interdiction missions. It supported Operation Overlord, the invasion of Normandy by attacking transportation targets, including bridges, along with airfields and strong points in France. On D Day, the squadron and the rest of the 446th Group led the first heavy bomber mission of the day. The 446th aided ground forces at Caen and Saint-Lo during July by hitting bridges, gun batteries, and enemy troops. During Operation Market Garden, the attempt to seize a bridgehead across the Rhine in the Netherlands, the 704th dropped supplies to allied troops near Nijmegen. It struck lines of communications during the Battle of the Bulge. During Operation Varsity in March 1945, it supplied ground and airborne troops near Wesel. The squadron flew its last combat mission on 25 April 1945 against Salzburg, Austria. The group had flown 273 missions and had lost 58 aircraft during the war,
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Solution: During Operation Market Garden, the attempt to seize a bridgehead across the Rhine in the Netherlands, the 704th dropped supplies to allied troops near Nijmegen.
Why? The passage describes the 704th's actions during Operation Market Garden.

New input: Question: In what year was the group that build the improved Devils Canyon Road formed? Passage:Devils Canyon was originally home to the PortlandSpokane line of the Spokane, Portland and Seattle Railway, completed in 1908 with a small tunnel near the north bank of the Snake River. The United States Army Corps of Engineers built an improved Devils Canyon Road to connect Kahlotus to a grain facility owned by the newly established Port of Kahlotus in 1961. The Lower Monumental Dam on the Snake River was completed in February 1969 and opened in May of the same year at the south end of Devils Canyon. The rail line fell into disuse by 1987 and the right-of-way was acquired by the Washington State Park System in 1991 to become the Columbia Plateau Trail. The road was designated as State Route263 (SR263) in 1991 and signed into law on April 1, 1992 to serve the Port of Kahlotus, now the Port of Windust, and connect to the existing SR260 in Kahlotus. No major revisions have occurred since the signing of the highway in 1961, however a landslide in July 2012 closed the highway for two days as Washington State Department of Transportation crews cleared up to of debris and later repairing damaged asphalt.

Solution:
The United States Army Corps of Engineers built an improved Devils Canyon Road to connect Kahlotus to a grain facility owned by the newly established Port of Kahlotus in 1961