you are likely to find Couch in/at/on Room. you are likely to find Electricity in/at/on Room. 
Murder is a type of Crime. Fire can Murder. Fire is related to Substance. System is a type of Substance. 
Couch --AtLocation--> Room <--AtLocation-- Electricity 
Crime <--IsA-- Murder <--CapableOf-- Fire <--RelatedTo--> Substance <--IsA-- System 