Shelf is etymologically related to Carve. you are likely to find Shelf in/at/on Wall. Wall is related to Monument. Monument is related to Capital. 
Regime is related to Diet. Diet is a type of Fare. Fare is related to Entry. Entry is the opposite of Leave. 
Carve <--EtymologicallyRelatedTo-- Shelf --AtLocation--> Wall <--RelatedTo--> Monument <--RelatedTo--> Capital 
Regime <--RelatedTo--> Diet --IsA--> Fare <--RelatedTo--> Entry <--Antonym--> Leave 