Upon identifying the presence of the television commercial, {HEAD ~ the television commercial detector} provides an indication of the presence of the television commercial to direct further processing of {TAIL ~ the television commercial} 
Upon identifying the presence of the television commercial , { HEAD ~ the television commercial detector } provides an indication of the presence of the television commercial to direct further processing of { TAIL ~ the television commercial }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL