Gray is related to Old. Old is related to Railroad. Railroad is etymologically related to Road. Road is related to Chicken. 
Debut is a type of Introduce. Introduce is related to Give. Give is a synonym of Guess. Guess is a synonym of Prediction. 
Gray <--RelatedTo--> Old <--RelatedTo--> Railroad --EtymologicallyRelatedTo--> Road <--RelatedTo--> Chicken 
Debut --IsA--> Introduce <--RelatedTo--> Give <--Synonym--> Guess <--Synonym--> Prediction 