Comparison is the opposite of Son. Son is related to Kid. Kid is related to Class. Class is related to Reading. 
you are likely to find Pencil in/at/on Drawer. Pencil is related to Case. 
Comparison <--Antonym--> Son <--RelatedTo--> Kid <--RelatedTo--> Class <--RelatedTo--> Reading 
Drawer <--AtLocation-- Pencil <--RelatedTo--> Case 