responsive to determining that the media content is interest to {HEAD ~ the user}, indexing a media database with {TAIL ~ the extracted semantic text features} 
responsive to determining that the media content is interest to { HEAD ~ the user } , indexing a media database with { TAIL ~ the extracted semantic text features }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL