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 : ISO 3166-2:CZ is the entry for the Czech Republic 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:CZ 
Relation : standards body

A: Who set the standards for ISO 3166-2:CZ?
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Q: Context : The Duke of Wellington's Regiment (West Riding) was a line infantry regiment of the British Army, forming part of the King's Division. 
Subject : Duke of Wellington's Regiment 
Relation : military branch

A: What branch was Duke of Wellington's Regiment part of?
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Q: Context : The Soviet RPG-22 Netto is a one-shot disposable anti-tank rocket launcher first deployed in 1985, based on the RPG-18 rocket launcher, but firing a larger 72.5 mm fin stabilised projectile. 
Subject : RPG-22 
Relation : service entry

A:
In what year did RPG-22 enter service?
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