Person wants (to) Peaceful. Person is related to Affair. Affair can cause/lead to Scandal. Politician does not want (to) Scandal. 
Price is related to Buy. Buy requires Order. Order is a synonym of Tell. 
Peaceful <--Desires-- Person <--RelatedTo--> Affair --Causes--> Scandal <--NotDesires-- Politician 
Price <--RelatedTo--> Buy --HasPrerequisite--> Order <--Synonym--> Tell 