Shoulder is a type of Edge. Shoulder is related to Part. Part is related to Lead. Lead is a type of Strip. 
Heavy is related to Weigh. Weigh is related to Measurement. 
Edge <--IsA-- Shoulder <--RelatedTo--> Part <--RelatedTo--> Lead --IsA--> Strip 
Heavy <--RelatedTo--> Weigh <--RelatedTo--> Measurement 