The apparatus 8, wherein {HEAD ~ said alerting means} includes {TAIL ~ means} for transmitting a distinguishable audio signal 
includes
The apparatus 8 , wherein { HEAD ~ said alerting means } includes { TAIL ~ means } for transmitting a distinguishable audio signal
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH