Object is related to Can. Can is related to Open. Open is a synonym of Afford. 
Drop is a synonym of Dismiss. Dismiss is a synonym of Fire. Fire is related to Shoot. Shooting is a form of Shoot. 
Object <--RelatedTo--> Can <--RelatedTo--> Open <--Synonym--> Afford 
Drop <--Synonym--> Dismiss <--Synonym--> Fire <--RelatedTo--> Shoot <--FormOf-- Shooting 