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.

Context : We Didn't Mean to Go to Sea is the seventh book in Arthur Ransome's Swallows and Amazons series of children's books. 
Subject : We Didn't Mean to Go to Sea 
Relation : series
What is the series called that We Didn't Mean to Go to Sea belongs to?

Context : The Panzerfaust 3 (Tank fist 3 or ``The German RPG'') is a modern disposable recoilless anti-tank weapon, which was developed between 1978 and 1985 and put into service by the Bundeswehr in 1992. 
Subject : Panzerfaust 3 
Relation : service entry
What year did Panzerfaust 3 come into use?

Context : General S. Cyril Ranatunga, VSV, rcds, psc was a Sri Lankan general and diplomat. 
Subject : Cyril Ranatunga 
Relation : occupation

What was Cyril Ranatunga's occupation?