modifying indication of relevancy with respect to ones of {TAIL ~ pieces} of the media content based on the patterns of {HEAD ~ the media content} use 
modifying indication of relevancy with respect to ones of { TAIL ~ pieces } of the media content based on the patterns of { HEAD ~ the media content } use
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH