Retirement is a synonym of Departure. Departure is related to Arrive. Arrive is the opposite of Leave. one thing you do when you Spit is Leave. 
Swim is related to Athletic. Athletic is related to Race. Race is related to Olympics. 
Retirement <--Synonym--> Departure <--RelatedTo--> Arrive <--Antonym--> Leave <--HasSubevent-- Spit 
Swim <--RelatedTo--> Athletic <--RelatedTo--> Race <--RelatedTo--> Olympics 