In {TAIL ~ dry milling}, {HEAD ~ the whole grain} is milled and used in the process 
In
In { TAIL ~ dry milling } , { HEAD ~ the whole grain } is milled and used in the process
REL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH