The fuel is then combusted in {HEAD ~ the combustion chamber} to produce {TAIL ~ at least one byproduct} including the manganese compound 
to produce
The fuel is then combusted in { HEAD ~ the combustion chamber } to produce { TAIL ~ at least one byproduct } including the manganese compound
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH