sentences: if something is a whole of something then that something can be lost in that something
docs: abandoned_thing is tangible_thing. whole is object. artifact is whole. lost_river is tangible_thing. part_of_thing is less_than_whole_thing. lost_river is natural_thing. mammal_whole_body is tangible_thing. burnt_thing is tangible_thing. matter is tangible_thing. living_thing is whole.