Arrangement is related to Bed. Bed is related to Post. Post is related to British. British is related to Minister. 
Model is a type of Leader. Leader is a synonym of Driver. Driver is a type of Worker. Scientist is a type of Worker. 
Arrangement <--RelatedTo--> Bed <--RelatedTo--> Post <--RelatedTo--> British <--RelatedTo--> Minister 
Model --IsA--> Leader <--Synonym--> Driver --IsA--> Worker <--IsA-- Scientist 