(subclass Sign ContentBearingObject) | Mid-level-ontology.kif 17119-17119 | Sign 是 有内用物体 的 subclass |
(subclass Sign DisplayArtifact) | Mid-level-ontology.kif 17120-17120 | Sign 是 显示神器 的 subclass |
(subclass Sign DataDisplayDevice) | Media.kif 851-851 | Sign 是 DataDisplayDevice 的 subclass |