{HEAD ~ These transgenic plants} can be used to remove pollutants from soil or as {TAIL ~ nutritional supplements} to treat iron or zinc deficiency 
used as
{ HEAD ~ These transgenic plants } can be used to remove pollutants from soil or as { TAIL ~ nutritional supplements } to treat iron or zinc deficiency
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH