Display nanopub dataset statistics in the docs #22
Description
We could add some SPARQL queries to the pipeline to allow for updating the docs on nanopubs with some cool stats and summaries, e.g., how many streams of each type we have.
This can be done directly in rdflib, with the caveat that it will get slow when the dataset expands. See: #21
We could also just query a public SPARQL endpoint of nanopubs.