Quality is related to Characteristic. Characteristic is related to Stretch. Stretch is a synonym of Bird. Bird is related to Pet. 
Testify is a synonym of Prove. Prove is related to Use. 
Quality <--RelatedTo--> Characteristic <--RelatedTo--> Stretch <--Synonym--> Bird <--RelatedTo--> Pet 
Testify <--Synonym--> Prove <--RelatedTo--> Use 