Yard is related to Grass. Grass is related to Slope. Slope is a type of Lean. Lean is a synonym of Angle. 
Right is related to Perfect. Perfect is a synonym of Expert. 
Yard <--RelatedTo--> Grass <--RelatedTo--> Slope --IsA--> Lean <--Synonym--> Angle 
Right <--RelatedTo--> Perfect <--Synonym--> Expert 