you are likely to find Chest in/at/on Animal. you are likely to find Chest in/at/on Bedroom. 
Public is related to Sign. Sign is a type of Clue. Clue is a synonym of Signature. 
Animal <--AtLocation-- Chest --AtLocation--> Bedroom 
Public <--RelatedTo--> Sign --IsA--> Clue <--Synonym--> Signature 