Dry is related to Fly. Fly is a type of Operate. 
Football is related to Ground. Ground is related to Carpet. Carpet is related to Fabric. Web is a type of Fabric. 
Dry <--RelatedTo--> Fly --IsA--> Operate 
Football <--RelatedTo--> Ground <--RelatedTo--> Carpet <--RelatedTo--> Fabric <--IsA-- Web 