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