{HEAD ~ The water} used to make up the alkaline solution can either be supplied from an external source or in {TAIL ~ part} or in total from water produced with the oil 
{ HEAD ~ The water } used to make up the alkaline solution can either be supplied from an external source or in { TAIL ~ part } or in total from water produced with the oil
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH