(subclass DisplayArtifact Artifact) | Mid-level-ontology.kif 3353-3353 | |
(subclass Sign DisplayArtifact) | Mid-level-ontology.kif 17120-17120 | |
(subclass Whiteboard DisplayArtifact) | Mid-level-ontology.kif 25624-25624 | |
(subclass Blackboard DisplayArtifact) | Media.kif 1087-1087 | |
(subclass Poster DisplayArtifact) | Media.kif 1102-1102 |