Fleet is related to Group. Group is related to Company. Service is a type of Company. Service is related to Customer. 
Money is related to Safe. Safe is a different concept from Fear. Fear is related to Terror. 
Fleet <--RelatedTo--> Group <--RelatedTo--> Company <--IsA-- Service <--RelatedTo--> Customer 
Money <--RelatedTo--> Safe <--DistinctFrom--> Fear <--RelatedTo--> Terror 