Butt is a synonym of Ass. Ass is related to Bottom. Bottom is the opposite of Top. Top is related to Direction. 
City is related to Noise. Noise is related to Yell. one thing you do when you Surprising is Yell. one thing you do when you Surprising is Grin. 
Butt <--Synonym--> Ass <--RelatedTo--> Bottom <--Antonym--> Top <--RelatedTo--> Direction 
City <--RelatedTo--> Noise <--RelatedTo--> Yell <--HasSubevent-- Surprising --HasSubevent--> Grin 