Set is a type of Bag. Bag is related to Glad. 
Artificial is the opposite of Natural. Natural is related to Wind. Wind is related to Outside. Outside is related to Market. 
Set --IsA--> Bag <--RelatedTo--> Glad 
Artificial <--Antonym--> Natural <--RelatedTo--> Wind <--RelatedTo--> Outside <--RelatedTo--> Market 