Instructions: 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.
Input: Context : Friedrich Kettler (Latvian: Fridrihs Ketlers, 25 November 1569 in Mitava (German Mitau, now Jelgava) -- 17 August 1642) was Duke of Courland (Latvian: Kurzeme, now part of Latvia) from 1587 to 1642.
Subject : Friedrich Kettler
Relation : spouse
Output:
What is Friedrich Kettler's spouse's name?