Snap is a type of Motion. Snap is a synonym of Photograph. 
Outdoor is related to Sky. Sky is the opposite of Fog. Fog is part of Weather. Weather can be Mild. 
Motion <--IsA-- Snap <--Synonym--> Photograph 
Outdoor <--RelatedTo--> Sky <--Antonym--> Fog --PartOf--> Weather --HasProperty--> Mild 