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 : ``Bart the Genius'' is the second episode of The Simpsons' first season, which originally aired on the Fox network on January 14, 1990. 
Subject : Bart the Genius 
Relation : series
Example Output: What series is Bart the Genius part of?

Example Input: Context : 5 Tauri (5 Tau) is a star in the constellation Taurus. 
Subject : 5 Tauri 
Relation : constellation
Example Output: Which constellation is 5 Tauri a part of?

Example Input: Context : NGC 7026 is a planetary nebula located 6000 light years away, in the constellation of Cygnus. 
Subject : NGC 7026 
Relation : constellation
Example Output:
Which constellation is NGC 7026 in?