Milk and other animal products are important as a food source contributing {HEAD ~ more than a third} of {TAIL ~ the calories}, and between a third and all of the major nutrients in the U.S. food supply 
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Milk and other animal products are important as a food source contributing { HEAD ~ more than a third } of { TAIL ~ the calories } , and between a third and all of the major nutrients in the U.S. food supply
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH