On the coordinate z 102, for example, the probability in regard to a call for help of the clients A, B, C can be recorded at {TAIL ~ the time} at {HEAD ~ the locations} 
On the coordinate z 102 , for example , the probability in regard to a call for help of the clients A , B , C can be recorded at { TAIL ~ the time } at { HEAD ~ the locations }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD