Nation is the opposite of Example. Example is related to Teaching. Teaching requires Experience. Experience is related to Trait. 
House can be used for Protection. you are likely to find Bath in/at/on House. 
Nation <--Antonym--> Example <--RelatedTo--> Teaching --HasPrerequisite--> Experience <--RelatedTo--> Trait 
Protection <--UsedFor-- House <--AtLocation-- Bath 