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