Beautiful is the opposite of Weak. Weakness is derived from Weak. Weakness is the opposite of Force. Force is related to Make. 
you are likely to find Bathroom in/at/on Library. you are likely to find Dust in/at/on Library. 
Beautiful <--Antonym--> Weak <--DerivedFrom-- Weakness <--Antonym--> Force <--RelatedTo--> Make 
Bathroom --AtLocation--> Library <--AtLocation-- Dust 