Blade is a type of Runner. Runner is related to Candidate. Candidate is related to Election. Election is related to Result. 
Bullet is related to Use. Use is a different concept from Waste. 
Blade --IsA--> Runner <--RelatedTo--> Candidate <--RelatedTo--> Election <--RelatedTo--> Result 
Bullet <--RelatedTo--> Use <--DistinctFrom--> Waste 