Natural is related to Shade. Shade is related to Absence. Absence is the opposite of Presence. 
Young is the opposite of Big. Big is related to Love. Love is related to Respect. Respect is related to Mess. 
Natural <--RelatedTo--> Shade <--RelatedTo--> Absence <--Antonym--> Presence 
Young <--Antonym--> Big <--RelatedTo--> Love <--RelatedTo--> Respect <--RelatedTo--> Mess 