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 : Umar, also spelled Omar (Arabic: , translit. Umar ibn Al-Khattab, Umar Son of Al-Khattab, born c.583 CE -- died 3 November 644 CE), was one of the most powerful and influential Muslim caliphs in history.
Subject : Umar
Relation : conflict
Output:
What war was Umar in?