Dispute is a synonym of Contend. Contend is a type of Claim. Claim is related to Gold. Gold is related to Oil. 
Free is a synonym of Rescue. Rescue is related to Operation. 
Dispute <--Synonym--> Contend --IsA--> Claim <--RelatedTo--> Gold <--RelatedTo--> Oil 
Free <--Synonym--> Rescue <--RelatedTo--> Operation 