Revision as of 04:37, 16 February 2023 by Mycommunitysg(talk | contribs)(Created a new Property: subclass of, this item is a subclass (subset) of that item; all instances of these items are instances of those items; different from P31 (instance of), e.g.: K2 is an instance of mountain; volcano is a subclass of mountain (and an instance of volcanic landform).)