{HEAD ~ The method} further includes {TAIL ~ the steps} of introducing a hydrogen containing gas into a space in the chamber between the first and second electrodes and causing the vapor to pass through the second electrode and into the space between the electrodes 
includes
{ HEAD ~ The method } further includes { TAIL ~ the steps } of introducing a hydrogen containing gas into a space in the chamber between the first and second electrodes and causing the vapor to pass through the second electrode and into the space between the electrodes
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH