Jacket is related to Light. Light is a type of Position. Position is related to Smile. Smile is a synonym of Grin. 
Register is a type of Regulator. Inventory is a type of Register. 
Jacket <--RelatedTo--> Light --IsA--> Position <--RelatedTo--> Smile <--Synonym--> Grin 
Regulator <--IsA-- Register <--IsA-- Inventory 