Portfolio is a type of List. Item is part of List. Item is related to Bullet. Bullet can be used for Murder. 
Class is related to Gym. Gym is related to Climb. Climb is related to Motion. 
Portfolio --IsA--> List <--PartOf-- Item <--RelatedTo--> Bullet --UsedFor--> Murder 
Class <--RelatedTo--> Gym <--RelatedTo--> Climb <--RelatedTo--> Motion 