{HEAD ~ The approach} can further form {TAIL ~ an overall rating} of the media by aggregating the ratings of set of event types within the media 
form
{ HEAD ~ The approach } can further form { TAIL ~ an overall rating } of the media by aggregating the ratings of set of event types within the media
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH