Thus, {HEAD ~ detection} of {TAIL ~ the existence} of a vulnerability is used to indicate noncompliance with an associated requirement while absence of a vulnerability is used to indicate compliance with the associated requirement 
of
Thus , { HEAD ~ detection } of { TAIL ~ the existence } of a vulnerability is used to indicate noncompliance with an associated requirement while absence of a vulnerability is used to indicate compliance with the associated requirement
OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL 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