You will be given a definition of a task first, then some input of the task.
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 : For a long time, unlike many other GTK+ applications, Inkscape used its own rendering library to create graphics, called libnr. 
Subject : Inkscape 
Relation : based on
Output:
The Inkscape is based upon what?