Stuff is related to Sugar. Sugar is related to White. White is related to Shark. Shark is related to Predator. 
Powder is related to Dust. you are likely to find Dust in/at/on Library. you are likely to find Silence in/at/on Library. Silence is the opposite of Voice. 
Stuff <--RelatedTo--> Sugar <--RelatedTo--> White <--RelatedTo--> Shark <--RelatedTo--> Predator 
Powder <--RelatedTo--> Dust --AtLocation--> Library <--AtLocation-- Silence <--Antonym--> Voice 