Add a verbose mode so user can see which format each triple comes from

[alexkreidler]

Many pages include triples in various formats, e.g. RDFa/microdata and JSON-LD at the same time.

It would be great to have an option that annotated each triple with the plugin source it came from both in the TS library and the CLI tool.

Thanks for so many awesome projects!

[rubensworks]

So basically you'd like to known what RDF format each triple was generated from?

This wouldn't be a trivial feature, especially considering performance. Related to provenance in Comunica: https://github.com/comunica/comunica/issues/732