sentences: if something contains something else then that something else can be lost in that something
docs: another_way_to_say_separates_things is divides_objects. abandoned_thing is tangible_thing. storage is somewhere_to_put_things. separated_thing is divided_thing. obstacle is tangible_thing. else is river. stealing_storage_space is unnatural_thing. change is when_one_thing_becomes_another_thing. space is what_between_else. lost_river is tangible_thing.