you are likely to find Knowledge in/at/on Class. you are likely to find Confusion in/at/on Class. you are likely to find Confusion in/at/on Opera. 
Hot is related to Burn. Burn is a type of Execute. Execute is a synonym of Start. Start is a different concept from Landing. 
Knowledge --AtLocation--> Class <--AtLocation-- Confusion --AtLocation--> Opera 
Hot <--RelatedTo--> Burn --IsA--> Execute <--Synonym--> Start <--DistinctFrom--> Landing 