How does StageAgent classify a monologue or scene as contemporary vs. classical?

We typically flag monologues and scenes from plays produced before 1900 as 'classical' and monologues and scenes from more recent plays as 'contemporary'.  However, there are also some pieces from the early 1900s Victorian and Edwardian periods that we have flagged as classical. Note that on each show guide, we include a Show Information section that displays the year the play was first produced.