Meeting is related to Interview. Interview is related to Apply. 
Payment is related to Require. Require is related to Demand. Demand is related to Bill. Bill is related to Collection. 
Meeting <--RelatedTo--> Interview <--RelatedTo--> Apply 
Payment <--RelatedTo--> Require <--RelatedTo--> Demand <--RelatedTo--> Bill <--RelatedTo--> Collection 