Afford is related to Buy. you would Buy because Better. Better is related to Shock. Shock is related to Sensation. 
Piece is related to Section. Chapter is a type of Section. 
Afford <--RelatedTo--> Buy --MotivatedByGoal--> Better <--RelatedTo--> Shock <--RelatedTo--> Sensation 
Piece <--RelatedTo--> Section <--IsA-- Chapter 