you are likely to find Doorway in/at/on Room. Doorway is related to House. you are likely to find Computer in/at/on House. Computer is related to Bit. 
you are likely to find Water in/at/on Pond. Water cannot be Solid. Soap is a type of Solid. 
Room <--AtLocation-- Doorway <--RelatedTo--> House <--AtLocation-- Computer <--RelatedTo--> Bit 
Pond <--AtLocation-- Water --NotHasProperty--> Solid <--IsA-- Soap 