A second receiving unit of {TAIL ~ the plurality} of receiving units forms {HEAD ~ a selection} for the content and communicating the selection to the first receiving unit 
A second receiving unit of { TAIL ~ the plurality } of receiving units forms { HEAD ~ a selection } for the content and communicating the selection to the first receiving unit
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH