you are likely to find Debris in/at/on Bridge. Bridge is related to Metal. Metal is related to Wood. 
Housing is related to Bank. you are likely to find Coin in/at/on Bank. Coin is related to One. 
Debris --AtLocation--> Bridge <--RelatedTo--> Metal <--RelatedTo--> Wood 
Housing <--RelatedTo--> Bank <--AtLocation-- Coin <--RelatedTo--> One 