In this task, you're given a context, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both context and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the context or linked information.
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Question: Context: the river passes through Yellowtail Dam and Afterbay Dam Link Information: The dam was authorized in 1944 and groundbreaking was in 1961;  Answer: 1961

Answer: What year did construction begin on the dam that the river passes through before Afterbay Dam?


Question: Context: In the 1880s, he also attended Columbian College (now George Washington University) for medicine, Link Information: The George Washington University (GW or GWU) is a private research university in Washington, D.C. Answer: Washington, D.C.

Answer: What city was George Washington University located?


Question: Context: Reed College, Link Information: he studied at Reed College, receiving a BA in 1932. Answer: Dexter Keezer

Answer:
Who was president of Reed College the year John Backus graduated?