initiating a content search by submitting {HEAD ~ a search request} to {TAIL ~ the file sharing network}, the search request comprising one or more keywords 
to
initiating a content search by submitting { HEAD ~ a search request } to { TAIL ~ the file sharing network } , the search request comprising one or more keywords
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH