Track is related to Running. Running is related to Race. Animal can be used for Race. 
Big is related to Home. Home is related to Pet. Pet is related to Bird. Bird is a synonym of Finger. 
Track <--RelatedTo--> Running <--RelatedTo--> Race <--UsedFor-- Animal 
Big <--RelatedTo--> Home <--RelatedTo--> Pet <--RelatedTo--> Bird <--Synonym--> Finger 