Demonstration is a type of Show. Presentation is a type of Show. Presentation is a synonym of Assignment. 
Provider is related to Fuel. Candle is a type of Fuel. Candle is related to Scent. Scent is related to Soap. 
Demonstration --IsA--> Show <--IsA-- Presentation <--Synonym--> Assignment 
Provider <--RelatedTo--> Fuel <--IsA-- Candle <--RelatedTo--> Scent <--RelatedTo--> Soap 