you are likely to find Platform in/at/on Arena. Platform is related to Medal. Medal is related to Reward. 
Low is related to Hill. Hill is related to Structure. Structure is related to Kind. 
Arena <--AtLocation-- Platform <--RelatedTo--> Medal <--RelatedTo--> Reward 
Low <--RelatedTo--> Hill <--RelatedTo--> Structure <--RelatedTo--> Kind 