system
Physical, social, political systems. viticulture, non-linear system, democracy, water system, etc. E.g. viticulture, non-linear system, democracy, water system, etc.
cognitive entity
Attitudes, cognitive abilities, ideologies, psychological phenomena, mind, etc. E.g. discernment, homophobia, precognition, etc.
activity
Any action or task planned or executed by an agent intentionally causing and participating in it. E.g. swimming, shopping, knowledge sharing, etc.
event
natural event
Any natural event, independently of its possible causes. E.g. avalanche, earthquake, brainwave, bonfire, etc.
characteristic
An aspect or quality of a thing. E.g. radial symmetry, poker face, alkalinity, attractiveness, darkness, etc.
topic
Any area, discipline, subject of knowledge. E.g. algebra, avionics, ballet, theology, engineering, etc.
location
A location, in a very generic sense e.g. geo-political entities, or physical object that are inherently located. E.g. Oslo, Australia, Inner Mongolia, resort area, intergalactic space, tundra, tunnel, etc.