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 : JTBC constructs a new building in Digital Media City in Sangam-dong, Seoul. 
Subject : JTBC 
Relation : parent company
Which company is the parent company of JTBC?

Context : Sotelma provides local telephony, international telephony, internet service and mobile telephone service, etc. Its mobile service subsidiary is Malitel. 
Subject : Sotelma 
Relation : parent company
Which company is the parent company of Sotelma?

Context : Katherine L. Gregory is a native of St. Louis, Missouri. 
Subject : Katherine L. Gregory 
Relation : military branch

What armed force did Katherine L. Gregory serve in?