Bitter is related to Basic. Basic is a type of Software. you are likely to find Software in/at/on Shelf. you are likely to find Shelf in/at/on Bedroom. 
you are likely to find Gentleman in/at/on University. Gentleman is related to Man. Man is related to Cave. Cave can be used for Exploration. 
Bitter <--RelatedTo--> Basic --IsA--> Software --AtLocation--> Shelf --AtLocation--> Bedroom 
University <--AtLocation-- Gentleman <--RelatedTo--> Man <--RelatedTo--> Cave --UsedFor--> Exploration 