Ring is related to Voice. Voice is a type of Communication. Language is a type of Communication. Persian is a type of Language. 
you are likely to find Elevator in/at/on Mall. Mall is related to Crowd. Crowd is the opposite of Empty. 
Ring <--RelatedTo--> Voice --IsA--> Communication <--IsA-- Language <--IsA-- Persian 
Elevator --AtLocation--> Mall <--RelatedTo--> Crowd <--Antonym--> Empty 