Shell is related to Beach. Beach is related to Resort. Resort is related to Rich. Rich is a synonym of Productive. 
Quarterback is related to Pass. Pass is related to Gap. Gap is a synonym of Window. 
Shell <--RelatedTo--> Beach <--RelatedTo--> Resort <--RelatedTo--> Rich <--Synonym--> Productive 
Quarterback <--RelatedTo--> Pass <--RelatedTo--> Gap <--Synonym--> Window 