On the other hand, if {HEAD ~ an intrusion sensor} 600 detects {TAIL ~ a probable intrusion attempt}, it is desirable to reduce the latency required to report the probable intrusion attempt 
detects
On the other hand , if { HEAD ~ an intrusion sensor } 600 detects { TAIL ~ a probable intrusion attempt } , it is desirable to reduce the latency required to report the probable intrusion attempt
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH