Shower is the opposite of Bath. you are likely to find Human in/at/on Bath. 
Call is a type of Instruction. Instruction is a type of Code. Code is related to Writing. Writing is related to Literary. 
Shower <--Antonym--> Bath <--AtLocation-- Human 
Call --IsA--> Instruction --IsA--> Code <--RelatedTo--> Writing <--RelatedTo--> Literary 