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