{HEAD ~ The main portion} further includes {TAIL ~ a pitched roof} that is selectively disposed on the ceiling and which has a pair of gable ends that have vent throughbores therethrough 
includes
{ HEAD ~ The main portion } further includes { TAIL ~ a pitched roof } that is selectively disposed on the ceiling and which has a pair of gable ends that have vent throughbores therethrough
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH