Disturbing is a form of Disturb. Disturb is a synonym of Eat. Eat is a synonym of Bother. Bother is a type of Confuse. 
City is related to Location. Region is a type of Location. Region is related to Nation. 
Disturbing --FormOf--> Disturb <--Synonym--> Eat <--Synonym--> Bother --IsA--> Confuse 
City <--RelatedTo--> Location <--IsA-- Region <--RelatedTo--> Nation 