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: Continuous weather observations have been maintained for the city of Boise since February 1, 1864 about 5 months after the U.S. Army established Fort Boise. Link Information: Boise's mayor, David H. Bieter, is of Basque descent Answer: David H. Bieter
[A]: Who is the current mayor of the city where the weather was continuously monitored after the U.S. Army established a fort?


[Q]: Context: Essex skippers' other foods include creeping soft grass Link Information: none Answer: none
[A]: Of the grasses that the essex skipper eats, which is the longest?


[Q]: Context: It also reached No. #31 on the US Billboard Mainstream Rock Chart and appeared on the Billboard Hot 100. Link Information: none Answer: none
[A]:
How long was it on the Billboard Hot 100?