Free is a type of Issue. Free is a synonym of Liberal. Liberal is the opposite of Conservative. Conservative is similar to Right. 
Carry is related to Load. Load is a type of Weight. Weight is related to Total. Total is related to Bill. 
Issue <--IsA-- Free <--Synonym--> Liberal <--Antonym--> Conservative <--SimilarTo--> Right 
Carry <--RelatedTo--> Load --IsA--> Weight <--RelatedTo--> Total <--RelatedTo--> Bill 