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.

Q: Context : Song at Midnight (simplified Chinese: 夜半歌声; traditional Chinese: 夜半歌聲; pinyin: Yè bàn gē shēng) (also known as Singing at Midnight or literally Voice of Midnight) is a 1937 film directed by Ma-Xu Weibang. 
Subject : Song at Midnight 
Relation : based on

A: Which is the basis of Song at Midnight?
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Q: Context : John Thomas Kennedy (July 22, 1885 - September 22, 1969) was a Second Lieutenant in the United States Army who received the Medal of Honor for actions during the Philippine-- American War. 
Subject : John Thomas Kennedy 
Relation : conflict

A: Which war was John Thomas Kennedy a part of?
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Q: Context : Norway - Upgraded to NASAMS 2. 
Subject : NASAMS 
Relation : service entry

A:
What year was NASAMS introduced?
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