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 : A pillar from Mathura referring to Chandragupta II has recently been dated to 388 CE. Chandragupta II's daughter, Prabhavatigupta, by his Naga queen Kuberanaga was married to the powerful Vakataka dynasty ruler Rudrasena II (r.380-385 CE). 
Subject : Chandragupta II 
Relation : spouse
Example Output: What is Chandragupta II's spouse's name?

Example Input: Context : Yu Hiu Tung (Chinese: 余曉東; pinyin: Yú Xiǎodōng; Jyutping: jyu4 hiu2 dung1; born 5 February 1984) is a professional tennis player from Hong Kong. 
Subject : Yu Hiu Tung 
Relation : residence
Example Output: What city is Yu Hiu Tung from?

Example Input: Context : Used by the U.S. Army, the U.S. Marine Corps, as well as many foreign militaries, the M47 Dragon was first fielded in January 1975 to U.S. Army soldiers stationed in mainland Europe. 
Subject : M47 Dragon 
Relation : service entry
Example Output:
What year did M47 Dragon come into use?