In particular, in response to the control signal, a television commercial detector analyzes the television signal to identify {HEAD ~ the presence} of the television commercial in {TAIL ~ the television signal} 
In particular , in response to the control signal , a television commercial detector analyzes the television signal to identify { HEAD ~ the presence } of the television commercial in { TAIL ~ the television signal }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL