Thus, if processing of {HEAD ~ data} of {TAIL ~ the particular segment} fails, work corresponding to that segment is lost, but not work performed on other segments 
of
Thus , if processing of { HEAD ~ data } of { TAIL ~ the particular segment } fails , work corresponding to that segment is lost , but not work performed on other segments
OTH OTH OTH OTH OTH 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 OTH OTH OTH