More specifically, {HEAD ~ the invention} is related to {TAIL ~ virus checking} and scanning, and to computer database searching 
is related to
More specifically , { HEAD ~ the invention } is related to { TAIL ~ virus checking } and scanning , and to computer database searching
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH