Swim is related to Back. Back is related to Heel. Heel is related to Walking. 
Deputy is a type of Legislator. Deputy is a different concept from Chief. Chief is related to Bull. Bull is a synonym of Cat. 
Swim <--RelatedTo--> Back <--RelatedTo--> Heel <--RelatedTo--> Walking 
Legislator <--IsA-- Deputy <--DistinctFrom--> Chief <--RelatedTo--> Bull <--Synonym--> Cat 