you are likely to find Fork in/at/on Plane. you are likely to find Fork in/at/on Drawer. you are likely to find Envelope in/at/on Drawer. Envelope is part of Balloon. 
Excitement is related to Sell. Trade entails/necessarily involves Sell. 
Plane <--AtLocation-- Fork --AtLocation--> Drawer <--AtLocation-- Envelope --PartOf--> Balloon 
Excitement <--RelatedTo--> Sell <--Entails-- Trade 