Generally, {HEAD ~ said fuel cell} is {TAIL ~ a net producer} of water, and said fuel processor 12 is a net consumer of water 
is
Generally , { HEAD ~ said fuel cell } is { TAIL ~ a net producer } of water , and said fuel processor 12 is a net consumer of water
OTH OTH 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 OTH OTH OTH