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 : 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 : Muppets Most Wanted is a 2014 American musical comedy film produced by Walt Disney Pictures and Mandeville Films, and the eighth theatrical film featuring the Muppets. 
Subject : Muppets Most Wanted 
Relation : narrative location
Which place is Muppets Most Wanted in?

Context : Since 1998, GSD&M has been part of the Omnicom Group. 
Subject : GSD&M 
Relation : parent company

Which company is the parent company of GSD&M?