Regulate is a type of Decide. Purpose is a type of Decide. Purpose is a synonym of Object. 
Sword is related to Fighting. Fighting is related to Army. you are likely to find Rifle in/at/on Army. 
Regulate --IsA--> Decide <--IsA-- Purpose <--Synonym--> Object 
Sword <--RelatedTo--> Fighting <--RelatedTo--> Army <--AtLocation-- Rifle 