instruction:
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.
question:
Context: He paid for the final extension of the Montgomery Canal from Berriew to Newtown Link Information: none Answer: none
answer:
Which city that the Montgomery Canal ran through after an extension has the largest population?


question:
Context: In 1126, Vicelinus decided to travel to Madgeburg, in order to see St. Norbert, who at that time was the archbishop. Link Information: 

In 1126 Pope Honorius II appointed Norbert to the Archbishopric of Magdeburg Answer: 1
answer:
How many years had St. Norbert held the position of archbishop when he was visited by Vicelinus?


question:
Context: was filmed at Black Park, a Country Park in Buckinghamshire, on 4 July 2006. Link Information: none Answer: none
answer:

When was the park built that was filmed at on July 4, 2006?