if something is made of something else, then that something else can be lost in that something
pawn is not tangible_thing. separated_thing is divided_thing. else is river. lost_river is tangible_thing. separated_thing is not divided_thing. goods is not tangible_thing. lost_river is not natural_thing. else is not river. lost_river is not tangible_thing. change is not when_one_thing_becomes_another_thing.