The power source connected to the cells produces a chemical reaction that produces a flow of chlorine atoms into the body of water for purifying {HEAD ~ the body} of {TAIL ~ water} 
The power source connected to the cells produces a chemical reaction that produces a flow of chlorine atoms into the body of water for purifying { HEAD ~ the body } of { TAIL ~ water }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL