Sheet is related to Blade. Blade is related to Weapon. Arena is a type of Weapon. Arena is related to Stage. 
Punishment is related to Capital. Capital is related to District. District is related to Regional. 
Sheet <--RelatedTo--> Blade <--RelatedTo--> Weapon <--IsA-- Arena <--RelatedTo--> Stage 
Punishment <--RelatedTo--> Capital <--RelatedTo--> District <--RelatedTo--> Regional 