detecting {HEAD ~ user access} of media content source by using a computer, {TAIL ~ the media content source} is stored in a computer readable storage medium 
detecting { HEAD ~ user access } of media content source by using a computer , { TAIL ~ the media content source } is stored in a computer readable storage medium
OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH