Money is related to Unit. Unit is related to Book. Secret is a type of Book. Secret is a type of Information. 
Dancer is related to Profession. Pilot is a type of Profession. Pilot is a synonym of Fly. 
Money <--RelatedTo--> Unit <--RelatedTo--> Book <--IsA-- Secret --IsA--> Information 
Dancer <--RelatedTo--> Profession <--IsA-- Pilot <--Synonym--> Fly 