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.
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Question: Context : The Weimar Republic, the successor state to the German Empire, implemented a program designed to update their remaining supplies of Gewehr 98 rifles for the Reichswehr in the years following World War I. Rifles allowed into service with the early Weimar security forces were stamped with a ``1920'' marking on their receiver ring. 
Subject : Gewehr 98 
Relation : conflict

Answer: In which war/battle did Gewehr 98 fight?


Question: Context : ISO 3166-2:MF is the entry for Saint Martin in ISO 3166-2, part of the ISO 3166 standard published by the International Organization for Standardization (ISO), which defines codes for the names of the principal subdivisions (e.g., provinces or states) of all countries coded in ISO 3166-1. 
Subject : ISO 3166-2:MF 
Relation : standards body

Answer: Who set the standards for ISO 3166-2:MF?


Question: Context : The episode was directed by David Carson, who had only helmed one other episode before ``Yesterday's Enterprise'' was shot. 
Subject : Yesterday's Enterprise 
Relation : series

Answer:
What is the series that Yesterday's Enterprise is a part of?