rdf:first
http://www.w3.org/1999/02/22-rdf-syntax-ns#first
rdfs:comment
http://www.w3.org/2000/01/rdf-schema#comment
The first item in the subject RDF list.
:
https://demo.triply.cc/vocabulary/rdf/graphs/
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default
https://demo.triply.cc/vocabulary/rdf/graphs/default