Experienced is the opposite of Green. Green is related to Lawn. Lawn is a type of Field. 
Minor is related to Key. Key is a type of Button. Button is related to Pant. 
Experienced <--Antonym--> Green <--RelatedTo--> Lawn --IsA--> Field 
Minor <--RelatedTo--> Key --IsA--> Button <--RelatedTo--> Pant 