Shadow is a type of Presence. Presence is related to State. State is related to Preserve. Preserve is related to Fruit. 
Air is a type of Gas. Air is related to Lung. Lung is etymologically related to Light. Light is the opposite of Deep. 
Shadow --IsA--> Presence <--RelatedTo--> State <--RelatedTo--> Preserve <--RelatedTo--> Fruit 
Gas <--IsA-- Air <--RelatedTo--> Lung --EtymologicallyRelatedTo--> Light <--Antonym--> Deep 