The identified portion may include {HEAD ~ an audio clip}, {TAIL ~ a video image}, and a video clip 
The identified portion may include { HEAD ~ an audio clip } , { TAIL ~ a video image } , and a video clip
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH