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 : Lumileds Lighting was formed in November 1999 as a joint venture between Philips Lighting and Agilent Technologies. 
Subject : Lumileds 
Relation : parent company
What company is Lumileds part of?

Context : Margie Velma Barfield (née Margie Velma Bullard) (October 29, 1932 -- November 2, 1984) was an American serial killer, convicted of one murder, but she eventually confessed to six murders. 
Subject : Velma Barfield 
Relation : convicted of
Which crime led to the conviction of Velma Barfield?

Context : The Maschinengewehr 34, or MG 34, is a German recoil-operated air-cooled machine gun, first tested in 1929, introduced in 1934, and issued to units in 1936. 
Subject : MG 34 
Relation : service entry

What year is MG 34 associated with?