sentences: removing hot objects from a heat source requires thermal insulators & an oven is a source of heat & a pan is a kind of object -> removing a hot pot from an stove requires a ergonal conductor removing a hot pan from an oven requires a thermal insulator  removing a hot pot from an stove requires a ergonal conductor & potholders are used to remove hot pans from an oven -> potholders are used as a thermal insulator to remove a hot pan from an oven