In {HEAD ~ certain offshore terminals}, {TAIL ~ many conduits} are necessary for carrying fluids between a pipe at the sea floor and a vessel at the sea surface 
In { HEAD ~ certain offshore terminals } , { TAIL ~ many conduits } are necessary for carrying fluids between a pipe at the sea floor and a vessel at the sea surface
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH 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