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 Fiat L6/40 was a light tank used by the Italian army from 1940 through World War II. It was designed by Fiat-Ansaldo as an export product, and was adopted by the Italian Army when officials learned of the design and expressed interest. 
Subject : Fiat L6/40 
Relation : service entry
In what year did Fiat L6/40 enter service?

Context : Gliese 649 is a red dwarf star in the constellation of Hercules, located roughly 34 light years from the Sun. The star has been found to host an extrasolar planet. 
Subject : Gliese 649 
Relation : constellation
Which was the constellation for Gliese 649?

Context : James M. Feigley is a retired Brigadier General in the United States Marine Corps. 
Subject : James M. Feigley 
Relation : military branch

What military branch was James M. Feigley associated with?