Thus, the National Academy of Science has emphasized a need to develop {HEAD ~ strategies} for changing {TAIL ~ the nutrient content} of animal products consistent with contemporary dietary recommendations 
Thus , the National Academy of Science has emphasized a need to develop { HEAD ~ strategies } for changing { TAIL ~ the nutrient content } of animal products consistent with contemporary dietary recommendations
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH