Summer is related to Swim. Swim is related to Back. 
Insurance is related to Claim. Claim is the opposite of Deny. Deny is the opposite of Believe. Believe is a type of Credit. 
Summer <--RelatedTo--> Swim <--RelatedTo--> Back 
Insurance <--RelatedTo--> Claim <--Antonym--> Deny <--Antonym--> Believe --IsA--> Credit 