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