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.

Example Input: Context : Rod Derline (born March 11, 1952) is a former professional basketball guard for the Seattle SuperSonics of the National Basketball Association (NBA). 
Subject : Rod Derline 
Relation : drafted by
Example Output: What team does Rod Derline belong to?

Example Input: Context : The Mysteron weaknesses discovered in ``Operation Time'' are developed in ``Spectrum Strikes Back'', its sequel episode. 
Subject : Operation Time 
Relation : series
Example Output: What series is Operation Time from?

Example Input: Context : The 2015 Canadian Grand Prix, formally known as the Formula 1 Grand Prix du Canada 2015, was a Formula One motor race held on 7 June 2015 at the Circuit Gilles Villeneuve in Montreal, Canada. 
Subject : 2015 Canadian Grand Prix 
Relation : point in time
Example Output:
What is the date when 2015 Canadian Grand Prix happened?