An announcer will explain knowledgeable information in {TAIL ~ regard} to the area through which {HEAD ~ the train} travels 
An announcer will explain knowledgeable information in { TAIL ~ regard } to the area through which { HEAD ~ the train } travels
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH