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