Viewer is derived from View. View is a synonym of Mind. Mind is a synonym of Learning. Learning is related to Play. 
Treat is related to Food. Food is related to Fly. Fly is related to Tie. Tie is a type of Form. 
Viewer --DerivedFrom--> View <--Synonym--> Mind <--Synonym--> Learning <--RelatedTo--> Play 
Treat <--RelatedTo--> Food <--RelatedTo--> Fly <--RelatedTo--> Tie --IsA--> Form 