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.

Q: Context: In March 1884, Lt. Vreeland began a three-year tour at sea aboard the sloop-of-war , after which he was assigned for two years at the Bureau of Navigation. Link Information: The U.S. Navy's Bureau of Navigation was established in 1862 as part of the reorganization of the Navy Department Answer: 1862 

A: When was the bureau established that   Lt. Vreeland was assigned after a three-year tour at sea aboard the sloop-of-war 
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Q: Context: but the helpful curator of the American Museum of Natural History, Link Information: none Answer: none

A: Who is the current curator of the museum featured in "We're Back! A Dinosaur's Story"?
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Q: Context: WQXL switched to country music in the summer of 1966 Link Information: WNOK 1230 AM signed on January 1, 1947 Answer: 19

A:
How many years had WNOK been operating when WQXL switched to country music?
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