Quality is related to Moral. Moral is a synonym of Ethical. 
Carbon is related to Element. Element is related to Color. Color is related to Milk. Milk is related to Production. 
Quality <--RelatedTo--> Moral <--Synonym--> Ethical 
Carbon <--RelatedTo--> Element <--RelatedTo--> Color <--RelatedTo--> Milk <--RelatedTo--> Production 