City is related to New. New is related to Spring. Spring is related to Bed. Bed is related to Mechanism. 
Treatment is a type of Management. Treatment is a synonym of Intervention. 
City <--RelatedTo--> New <--RelatedTo--> Spring <--RelatedTo--> Bed <--RelatedTo--> Mechanism 
Management <--IsA-- Treatment <--Synonym--> Intervention 