Substance is related to Wood. you are likely to find Wood in/at/on Desk. you are likely to find Pad in/at/on Desk. Pad can be used for Crash. 
Weight is related to Change. Change is a type of Dress. Clothes can be used for Dress. Clothes is related to Iron. 
Substance <--RelatedTo--> Wood --AtLocation--> Desk <--AtLocation-- Pad --UsedFor--> Crash 
Weight <--RelatedTo--> Change --IsA--> Dress <--UsedFor-- Clothes <--RelatedTo--> Iron 