Q: 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 Beretta M9, officially the Pistol, Semiautomatic, 9mm, M9, is a 919mm Parabellum pistol adopted by the United States Armed Forces in 1985.
Subject : Beretta M9
Relation : service entry
A:
What was the year Beretta M9 entered service?