you are likely to find Roof in/at/on Mouth. Mouth is related to Pipe. 
Record is related to Sheet. Sheet is related to Slip. Slip is related to Smooth. Smooth is related to Compound. 
Roof --AtLocation--> Mouth <--RelatedTo--> Pipe 
Record <--RelatedTo--> Sheet <--RelatedTo--> Slip <--RelatedTo--> Smooth <--RelatedTo--> Compound 