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 : All is Safely Gathered In is the eighth episode of the fifth series of the British comedy series Dad's Army. 
Subject : All is Safely Gathered In 
Relation : series
Of what series is All is Safely Gathered In a part of?

Context : Most TokuMX source files are made available under the terms of the GNU Affero General Public License (AGPL). 
Subject : TokuMX 
Relation : based on
The TokuMX is based upon what?

Context : Janar Talts (born 7 April 1983) is an Estonian professional basketball player. 
Subject : Janar Talts 
Relation : occupation

What kind of  occupation does Janar Talts have?