The apparatus further includes {TAIL ~ an illumination system} for illuminating the interior of {HEAD ~ the hole} 
The apparatus further includes { TAIL ~ an illumination system } for illuminating the interior of { HEAD ~ the hole }
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD