Property is related to Flow. Emission is a type of Flow. Emission is related to Exhaust. Exhaust is related to Smoke. 
Bowl is part of Pipe. Bowl is the opposite of Plate. Disk is a type of Plate. 
Property <--RelatedTo--> Flow <--IsA-- Emission <--RelatedTo--> Exhaust <--RelatedTo--> Smoke 
Pipe <--PartOf-- Bowl <--Antonym--> Plate <--IsA-- Disk 