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