Addition is related to Cross. Cross is related to Organization. Organization is a type of Activity. Activity is related to Hear. 
Arrow is a type of Mark. Mark is related to Visual. Visual is related to Illusion. 
Addition <--RelatedTo--> Cross <--RelatedTo--> Organization --IsA--> Activity <--RelatedTo--> Hear 
Arrow --IsA--> Mark <--RelatedTo--> Visual <--RelatedTo--> Illusion 