Affair is related to Encounter. Encounter is a synonym of Engage. Throw is a type of Engage. Throw is a synonym of Fire. 
Crack is a synonym of Gap. Gap is a type of Dispute. 
Affair <--RelatedTo--> Encounter <--Synonym--> Engage <--IsA-- Throw <--Synonym--> Fire 
Crack <--Synonym--> Gap --IsA--> Dispute 