Happiness is related to Toy. Toy is related to Bright. Bright is a synonym of Famous. 
Fast is related to Race. Race is related to Testing. Testing is a type of Examination. 
Happiness <--RelatedTo--> Toy <--RelatedTo--> Bright <--Synonym--> Famous 
Fast <--RelatedTo--> Race <--RelatedTo--> Testing --IsA--> Examination 