Brush is a type of Clean. Clean is related to Shower. one thing you do when you Smell is Shower. Smell is related to Activity. 
Meal is related to Break. Break is a type of Interrupt. Freeze is a type of Interrupt. 
Brush --IsA--> Clean <--RelatedTo--> Shower <--HasSubevent-- Smell <--RelatedTo--> Activity 
Meal <--RelatedTo--> Break --IsA--> Interrupt <--IsA-- Freeze 