Soviet is a type of Person. Person wants (to) Candy. Candy is related to Cloud. Cloud is the opposite of Clear. 
you are likely to find Sky in/at/on Planet. Sky can be used for Breathing. 
Soviet --IsA--> Person --Desires--> Candy <--RelatedTo--> Cloud <--Antonym--> Clear 
Planet <--AtLocation-- Sky --UsedFor--> Breathing 