Big is related to Event. Event is related to Burn. Burn is a type of Waste. Waste is the opposite of Conservation. 
Division is related to Equation. Equation is a synonym of Equality. 
Big <--RelatedTo--> Event <--RelatedTo--> Burn --IsA--> Waste <--Antonym--> Conservation 
Division <--RelatedTo--> Equation <--Synonym--> Equality 