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