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.

Ex Input:
Context : KLM Cityhopper is the regional subsidiary of KLM Royal Dutch Airlines (part of the Air France-KLM group). 
Subject : KLM Cityhopper 
Relation : parent company

Ex Output:
Which company is the parent company of KLM Cityhopper?


Ex Input:
Context : ISO 3166-2:AU is the entry for Australia in ISO 3166-2, part of the ISO 3166 standard published by the International Organization for Standardization (ISO), which defines codes for the names of the principal subdivisions (e.g., provinces or states) of all countries coded in ISO 3166-1. 
Subject : ISO 3166-2:AU 
Relation : standards body

Ex Output:
Who set the standards for ISO 3166-2:AU?


Ex Input:
Context : In 1961, the first M79 grenade launchers were delivered to the US Army. 
Subject : M79 grenade launcher 
Relation : service entry

Ex Output:

Which was the official year for the approval of M79 grenade launcher?