Small is related to Troop. Troop is a type of March. March is a type of Progress. 
you are likely to find Iron in/at/on House. House is related to Plate. you are likely to find Egg in/at/on Plate. 
Small <--RelatedTo--> Troop --IsA--> March --IsA--> Progress 
Iron --AtLocation--> House <--RelatedTo--> Plate <--AtLocation-- Egg 