Simple is related to Smooth. Smooth is related to Slip. Slip is a type of Forget. Forget is related to State. 
Sign is related to Ring. Canvas is part of Ring. 
Simple <--RelatedTo--> Smooth <--RelatedTo--> Slip --IsA--> Forget <--RelatedTo--> State 
Sign <--RelatedTo--> Ring <--PartOf-- Canvas 