Chef is a type of Software. Mail is a type of Software. you are likely to find Statement in/at/on Mail. Statement is related to Brief. 
Jet is related to Missile. Missile is a type of Bomb. Bomb can Destroy. 
Chef --IsA--> Software <--IsA-- Mail <--AtLocation-- Statement <--RelatedTo--> Brief 
Jet <--RelatedTo--> Missile --IsA--> Bomb --CapableOf--> Destroy 