Scale is related to Step. Step is a type of Block. Block is related to Article. Article is related to Journal. 
you are likely to find Cat in/at/on Cage. you are likely to find Cat in/at/on Bag. you are likely to find Bag in/at/on Trash. 
Scale <--RelatedTo--> Step --IsA--> Block <--RelatedTo--> Article <--RelatedTo--> Journal 
Cage <--AtLocation-- Cat --AtLocation--> Bag --AtLocation--> Trash 