This intermediary product can be further processed by {HEAD ~ direct exposure} to {TAIL ~ carbonate solutions} to form a second intermediary product comprising carbon, metal carbonate, and oxygen 
to
This intermediary product can be further processed by { HEAD ~ direct exposure } to { TAIL ~ carbonate solutions } to form a second intermediary product comprising carbon , metal carbonate , and oxygen
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH