instruction:
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.
question:
Context : The Stoner 63, also known as the M63, XM22, XM23, XM207 or the Mk 23 Mod 0 machine gun, is an American modular weapons system designed by Eugene Stoner in the early 1960s. 
Subject : Stoner 63 
Relation : service entry
answer:
In what year did Stoner 63 enter service?


question:
Context : Tom DeMarco was born in Hazleton, Pennsylvania. 
Subject : Tom DeMarco 
Relation : occupation
answer:
What was Tom DeMarco's career?


question:
Context : António Mendes Belo was born at São Pedro, Gouveia, (District of Guarda), Portugal, son of Miguel Mendes Belo and wife Rosalina dos Santos de Almeida da Mota. 
Subject : António Mendes Belo 
Relation : date of death
answer:

When was António Mendes Belo's death?