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.

[Q]: Context : As demand for international rail travel declined and the shipping business became almost exclusively dependent on passenger and freight vehicle traffic, the ferry business as was incorporated as Sealink UK Limited in 1978, a wholly owned subsidiary of the British Railways Board (BRB), but still as part of the Sealink consortium. 
Subject : Sealink 
Relation : parent company
[A]: What is Sealink's parent company?


[Q]: Context : In 1961, the first M79 grenade launchers were delivered to the US Army. 
Subject : M79 grenade launcher 
Relation : service entry
[A]: Which was the official year for the approval of M79 grenade launcher?


[Q]: Context : The .30-06 Springfield cartridge (pronounced ``thirty-aught-six'' or ``thirty-oh-six''), 7.62×63mm in metric notation and called ``.30 Gov't '06'' by Winchester, was introduced to the United States Army in 1906 and later standardized; it remained in use until the early 1980s. 
Subject : .30-06 Springfield 
Relation : service entry
[A]:
What year did .30-06 Springfield come into use?