{HEAD ~ Such alternatives} are within {TAIL ~ the knowledge} of one skilled in the art and are not further detailed herein 
are within
{ HEAD ~ Such alternatives } are within { TAIL ~ the knowledge } of one skilled in the art and are not further detailed herein
HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH