Assertion: hydrocarbon's ring | /r/HasProperty | two carbons
Facets:
Source sentences:
text: Subject matter containing at least four rings, each of which shares two adjacent carbon atoms with another ring, or two rings fused where at least one ring contains a different number of carbons from the others, or the ring system contains a bridge, that is, a carbocyclic ring which shares with another ring two carbons not adjacent to each other.