In the prior art, {HEAD ~ an end} of {TAIL ~ such pipeline} might be terminated at the base 44 where the buoy 40 was anchored, and a vertical pipe would extend up from the base to the buoy 40 
of
In the prior art , { HEAD ~ an end } of { TAIL ~ such pipeline } might be terminated at the base 44 where the buoy 40 was anchored , and a vertical pipe would extend up from the base to the buoy 40
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD 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