Day is part of Week. Week is the opposite of Month. 
Tooth is related to White. White is related to Sugar. Sugar is related to Dust. you are likely to find Dust in/at/on Bedroom. 
Day --PartOf--> Week <--Antonym--> Month 
Tooth <--RelatedTo--> White <--RelatedTo--> Sugar <--RelatedTo--> Dust --AtLocation--> Bedroom 