Part of the ‘Subject’ – something like the background of information in which your program is being run, which is available to the current running generator. Much like literature is written in time, and therefore has a historical context, to which it might be responsive, our programs operate in a context with which they can interact. Stated differently, the context is part of the available data to your program that is not explicitly provided (the explicitly provided data, by contrast, is the ‘Sample’).