Slavery is derived from Slave. Slave is a type of Person. Person wants (to) Privacy. Wall can be used for Privacy. 
Dock is a type of Herb. Dock is a synonym of Tail. Tail is a synonym of Chase. Chase is a synonym of Pursue. 
Slavery --DerivedFrom--> Slave --IsA--> Person --Desires--> Privacy <--UsedFor-- Wall 
Herb <--IsA-- Dock <--Synonym--> Tail <--Synonym--> Chase <--Synonym--> Pursue 