You will be given a context, a subject and a relation. Your task is to generate a question based on the subject and relation. The generated question should include the given subject. Try to use a minimum number of words that are not present in either context, subject or relation while generating question.
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Question: Context : Johann Zacherl was born in Munich (Germany) in 1814 and died in Vienna (Austria) in 1888.
Subject : Johann Zacherl
Relation : date of death

Answer: What year did Johann Zacherl die?

Question: Context : Decameron Nights is a 1953 anthology Technicolor film based on three tales from The Decameron by Giovanni Boccaccio, specifically the ninth and tenth tales of the second day and the ninth tale of the third.
Subject : Decameron Nights
Relation : based on

Answer: Which is the basis of Decameron Nights?

Question: Context : The Webley Revolver (also known as the Webley Top-Break Revolver or Webley Self-Extracting Revolver) was, in various marks, the standard issue service pistol for the armed forces of the United Kingdom, the British Empire, and the Commonwealth from 1887 until 1963.
Subject : Webley Revolver
Relation : service entry

Answer:
Which was the official year for the approval of Webley Revolver?