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 : The GER Class Y65 was a class of twelve 2-4-2T steam locomotives designed by S. D. Holden and built by the company's Stratford Works in 1909--1910. 
Subject : GER Class Y65 
Relation : service entry
What year was GER Class Y65 introduced?

Context : Joonas Korpisalo (born 28 April 1994) is a Finnish professional ice hockey goaltender currently playing with the Columbus Blue Jackets organization of the National Hockey League (NHL). 
Subject : Joonas Korpisalo 
Relation : drafted by
Which team does Joonas Korpisalo play for?

Context : John Keough (born 1835; date of death unknown) was a Union Army officer in the American Civil War who received the U.S. military's highest decoration, the Medal of Honor. 
Subject : John Keough 
Relation : conflict

What was the war that John Keough fought in?