Yeah, I've got a few ideas on how to integrate this further. Just listing them is cool, but it would be exceptionally neat to be able to use this to create ad-hoc filters, and say if you submit the query

  plato near:classics.mit.edu

and then get results from this list:

https://explore2.marginalia.nu/search?domain=classics.mit.ed...

... possibly ranked with consideration to their relatedness.