Ring is related to Shape. Shape is related to Globe. Globe is related to Eye. 
Infection is a type of Incident. Infection can cause/lead to Death. Death requires Life. Life is related to Energy. 
Ring <--RelatedTo--> Shape <--RelatedTo--> Globe <--RelatedTo--> Eye 
Incident <--IsA-- Infection --Causes--> Death --HasPrerequisite--> Life <--RelatedTo--> Energy 