Swim is related to Walking. Walking is related to Travel. Travel requires Careful. Careful is a synonym of Concerned. 
Protection is related to Shade. Shade is related to Big. Big is related to Dog. Dog is a synonym of Guy. 
Swim <--RelatedTo--> Walking <--RelatedTo--> Travel --HasPrerequisite--> Careful <--Synonym--> Concerned 
Protection <--RelatedTo--> Shade <--RelatedTo--> Big <--RelatedTo--> Dog <--Synonym--> Guy 