Particular is related to Date. Date is related to Birthday. 
Owe is related to Bill. Bill is related to Fee. Fee is related to Money. Money is related to Time. 
Particular <--RelatedTo--> Date <--RelatedTo--> Birthday 
Owe <--RelatedTo--> Bill <--RelatedTo--> Fee <--RelatedTo--> Money <--RelatedTo--> Time 