you are likely to find Knife in/at/on Drawer. you are likely to find Knife in/at/on War. War is a different concept from Piece. 
Introduce is a synonym of Present. Present is a synonym of Confront. 
Drawer <--AtLocation-- Knife --AtLocation--> War <--DistinctFrom--> Piece 
Introduce <--Synonym--> Present <--Synonym--> Confront 