Transport is related to Train. Train is related to Loop. Loop is related to String. 
Hunter is related to Killing. Killing requires Victim. Casualty is a type of Victim. 
Transport <--RelatedTo--> Train <--RelatedTo--> Loop <--RelatedTo--> String 
Hunter <--RelatedTo--> Killing --HasPrerequisite--> Victim <--IsA-- Casualty 