proton:hasContributor
http://www.ontotext.com/proton/protontop#hasContributor
rdfs:comment
http://www.w3.org/2000/01/rdf-schema#comment
An agent responsible for makin ...... ation, or a service. DC2003ISO
@en
graph:default
https://triplydb.com/ontotext/proton/graphs/default