It is {HEAD ~ another object} of {TAIL ~ my invention} to provide a pest extermination system which is permanently installed in a building structure 
of
It is { HEAD ~ another object } of { TAIL ~ my invention } to provide a pest extermination system which is permanently installed in a building structure
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH