if something contains something else then that something else can be lost in that something
abandoned_thing is tangible_thing. lost_river is tangible_thing. separated_thing is not divided_thing. stealing_storage_space is unnatural_thing. else is not river. storage is not somewhere_to_put_things. space is not what_between_else. stealing_storage_space is not unnatural_thing. lost_river is not tangible_thing. storage is somewhere_to_put_things.