Pipe is a type of Transport. Pipe is related to Smoke. Smoke is related to Burn. Burn is related to Lighting. 
you are likely to find Fire in/at/on Forest. you are likely to find Forest in/at/on Earth. 
Transport <--IsA-- Pipe <--RelatedTo--> Smoke <--RelatedTo--> Burn <--RelatedTo--> Lighting 
Fire --AtLocation--> Forest --AtLocation--> Earth 