Q: 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 : Mainova AG (FWB: MNV6) is one of the largest regional energy suppliers in Germany and supplies about one million people in Hessen and neighboring provinces with electricity, gas, heat and water.
Subject : Mainova
Relation : parent company
A:
What is Mainova's parent company?