Chemical is related to Metal. Metal is the opposite of Wooden. 
Reward is related to Winner. Winner is a type of Book. you are likely to find Book in/at/on Drawer. you are likely to find File in/at/on Drawer. 
Chemical <--RelatedTo--> Metal <--Antonym--> Wooden 
Reward <--RelatedTo--> Winner --IsA--> Book --AtLocation--> Drawer <--AtLocation-- File 