TASK DEFINITION: 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.
PROBLEM: Context: Henry's famous Walk to Canossa Link Information: The Road to Canossa, sometimes called the Walk to Canossa (/Kanossa) or Humiliation of Canossa (), refers to Holy Roman Emperor Henry IV's trek to Canossa Castle, Italy, where Pope Gregory VII was staying as the guest of Margravine Matilda of Tuscany, at the height of the investiture controversy in January 1077 Answer: 1077 

SOLUTION: What year did the Walk happen?

PROBLEM: Context: spin-off show Holby City Link Information: Casualty, stylised as CASUALY, is a British medical drama series that airs weekly on BBC One. It is the longest-running emergency medical drama television series in the world, and the most enduring medical drama shown on prime time television in the world. Created by Jeremy Brock and Paul Unwin, it was first broadcast in the United Kingdom on BBC One on 6 September 1986.  Answer: 13

SOLUTION: How long had Casualty been airing before its spinoff first aired?

PROBLEM: Context: Smith was originally drafted by the Boston Bruins in the second round (7th overall) in the 1966 NHL Amateur Draft Link Information: none Answer: none

SOLUTION:
Who was picked first in the draft in which Rick Smith was picked 7th overall?