{HEAD ~ This invention} is {TAIL ~ a surface modifying element} comprising a photosensitive layer on one side of a carrier substrate 
is
{ HEAD ~ This invention } is { TAIL ~ a surface modifying element } comprising a photosensitive layer on one side of a carrier substrate
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH