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 : JBTV is currently on broadcast television WJYS-62 in Chicago Wednesday nights at 11pm with New Music Videos and live JBTV performances. 
Subject : JBTV 
Relation : original network
Example Output: Which channel broadcast JBTV?

Example Input: Context : All is Safely Gathered In is the eighth episode of the fifth series of the British comedy series Dad's Army. 
Subject : All is Safely Gathered In 
Relation : series
Example Output: Of what series is All is Safely Gathered In a part of?

Example Input: Context : The Thames-class lifeboat was operated by the Royal National Lifeboat Institution (RNLI) from its stations around the coasts of the United Kingdom between 1974 and 1997. 
Subject : Thames-class lifeboat 
Relation : service entry
Example Output:
What year is Thames-class lifeboat associated with?