updated "Artifact" variations to material artifact (#785)

Author: johnbeve

src/cco-modules/AgentOntology.ttl

@@ -2074,7 +2074,7 @@ cco:ont00000987 rdf:type owl:Class ;
 cco:ont00001006 rdf:type owl:Class ;
                  rdfs:subClassOf obo:BFO_0000023 ;
                  rdfs:label "Operator Role"@en ;
-                 skos:definition "A Role that inheres in an Agent by virtue of that Agent's responsibilities to operate or control some Artifact."@en ;
+                 skos:definition "A Role that inheres in an Agent by virtue of that Agent's responsibilities to operate or control some Material Artifact."@en ;
                  skos:example "the role of driving a car" ,
                               "the role of flying an airplane" ,
                               "the role of operating a crane" ;