Relief is a type of Sculpture. Relief is related to Rest. Rest is related to Peace. Peace is related to Harmony. 
Swing is a type of Seat. Swing is a type of Aim. 
Sculpture <--IsA-- Relief <--RelatedTo--> Rest <--RelatedTo--> Peace <--RelatedTo--> Harmony 
Seat <--IsA-- Swing --IsA--> Aim 