a human is a kind of object
mailable_object is human_scale_object. one_kind_of_mammal is human. humans is one_type_of_physical_object. human is animal. portable_object is human_scale_object. human_body is physical_object. humanly_overleapable_object is tangible_thing. small_human_scale_object is human_scale_object. humans is living_objects. human_scale_object is tangible_thing.