Faceted browsing of chemicals in Wikidata

A few days ago Aidan and José introduced GraFa on the Wikidata mailing list. It is a faceted browser for content in Wikidata, and the screenshot on the right shows that for chemical compounds. They are welcoming feedback.

GraFa run on things of type chemical compound.

Besides this screenshot, I have not played with it a lot. It looks quite promising, and my initial feedback would be a feature to sort the results, and ability to export the full list to some other tool, e.g. download all those items as RDF.