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