{HEAD ~ One such fuel processor} is {TAIL ~ a steam reformer} which produces purified hydrogen from a carbon containing feedstock and water 
is
{ HEAD ~ One such fuel processor } is { TAIL ~ a steam reformer } which produces purified hydrogen from a carbon containing feedstock and water
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH