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.

Ex Input:
Context: In 1988 he returned to San Francisco Link Information: none Answer: none

Ex Output:
Was the crime rate in London higher than San Francisco the year Mitchison returned to San Francisco?


Ex Input:
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 

Ex Output:
What year did the Walk happen?


Ex Input:
Context: He received his doctoral degree on the basis of his dissertation on Lebesgue integrals and started to work as an academic teacher at his alma mater. Link Information: In mathematics, the integral of a non-negative function of a single variable can be regarded, in the simplest case, as the area between the graph of that function and the -axis.  Answer: the integral of a non-negative function of a single variable

Ex Output:

What is Lebesgue integrals?