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