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