From lime stone CaO quicklime Ca2 is produced while CO2 is used in {TAIL ~ the production} of {HEAD ~ soda} 
From lime stone CaO quicklime Ca2 is produced while CO2 is used in { TAIL ~ the production } of { HEAD ~ soda }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD