Begin is related to Being. Being is related to Happy. Happy is a different concept from Mean. 
Shade is related to Sense. Sense is related to Nose. Nose is related to Instrument. Engine is a type of Instrument. 
Begin <--RelatedTo--> Being <--RelatedTo--> Happy <--DistinctFrom--> Mean 
Shade <--RelatedTo--> Sense <--RelatedTo--> Nose <--RelatedTo--> Instrument <--IsA-- Engine 