In the present invention, {HEAD ~ the place} of occurrence of abnormality is estimated from the momentary positions of moving objects and {TAIL ~ the moving directions} of these objects 
is estimated from
In the present invention , { HEAD ~ the place } of occurrence of abnormality is estimated from the momentary positions of moving objects and { TAIL ~ the moving directions } of these objects
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL REL OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH