Table for the 4 triples for predicate cpack:usesSystemFile in graph https://cliopatria.swi-prolog.org/packs/opmv

SubjectObject
?:opmvc_schema.pl?:library(semweb/rdf_db)
?:opmvc_schema.pl?:library(semweb/rdf_library)
?:opmv_schema.pl?:library(semweb/rdf_db)
?:opmv_schema.pl?:library(semweb/rdf_library)