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 : 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
[A]: Which crime led to the conviction of Velma Barfield?


[Q]: Context : Hans Lotter (17 November 1917 -- 21 November 2008) was a highly decorated Oberleutnant in the Luftwaffe during World War II, and a recipient of the Knight's Cross of the Iron Cross. 
Subject : Hans Lotter 
Relation : military branch
[A]: In what military branch did Hans Lotter serve?


[Q]: Context : On 20 June 2008, the NetBSD Foundation announced a transition to the two clause BSD license, citing concerns with UCB support of clause 3 and industry applicability of clause 4. 
Subject : NetBSD 
Relation : based on
[A]:
Which is the basis of NetBSD?