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.

Context : Walter Oswald Watt, OBE (11 February 1878 -- 21 May 1921) was an Australian aviator and businessman. 
Subject : Oswald Watt 
Relation : conflict
What was the war that Oswald Watt fought in?

Context : After Attila's death in 453 AD, his Empire crumbled and its remains were ruled by his three sons, Ellac, Dengizich and Ernak. 
Subject : Ellac 
Relation : date of death
On what date did Ellac die?

Context : A Good Day to Die Hard is a 2013 American action film and the fifth installment in the Die Hard film series. 
Subject : A Good Day to Die Hard 
Relation : narrative location

Which place does A Good Day to Die Hard exist in?