Relief is a type of Emotion. Irony is a type of Emotion. 
Decrease is the opposite of Rise. Rise is a type of Change. Motion is a type of Change. Motion is related to Pull. 
Relief --IsA--> Emotion <--IsA-- Irony 
Decrease <--Antonym--> Rise --IsA--> Change <--IsA-- Motion <--RelatedTo--> Pull 