show how model handles work in multiple publication contexts, derivatives

It'd help me understand how the model is intended to see the [example
gist](https://gist.github.com/christopheradams/b5d4d9a1b4bd33efdc53) extended to include:
- the same work (which IIUC is currently described in the object of exampleOfWork is found on another web page
- a derivative of that same work, say with a filter applied, is found on a third web page

Start with the linked example gist and compare it with the repository's current model. Trace how the example represents a work found on another page, then extend the example to show the same work in multiple publication contexts and a derivative on a third page. Done means the resulting example clearly demonstrates all three relationships.

Written by the indexing model from the issue text.