Gentleman can be used for Lady. Gentleman is related to Person. Person wants (to) Privacy. 
Crop is related to Weapon. Iron is a type of Weapon. Iron is a type of Mineral. Mineral is related to Gold. 
Lady <--UsedFor-- Gentleman <--RelatedTo--> Person --Desires--> Privacy 
Crop <--RelatedTo--> Weapon <--IsA-- Iron --IsA--> Mineral <--RelatedTo--> Gold 