Bus is a type of Ride. Bus is related to Fare. 
Ongoing is related to Repeat. Repeat is related to Copy. Cast is a type of Copy. Cast is related to Iron. 
Ride <--IsA-- Bus <--RelatedTo--> Fare 
Ongoing <--RelatedTo--> Repeat <--RelatedTo--> Copy <--IsA-- Cast <--RelatedTo--> Iron 