Exist is related to Resist. Resist is the opposite of Submit. Submit is a synonym of Depict. 
Wall is related to Bed. Bed is related to Night. Midnight is part of Night. 
Exist <--RelatedTo--> Resist <--Antonym--> Submit <--Synonym--> Depict 
Wall <--RelatedTo--> Bed <--RelatedTo--> Night <--PartOf-- Midnight 