The system 15, where {HEAD ~ the engine} is automatically started without {TAIL ~ an operator request} to start the engine 
is automatically started without
The system 15 , where { HEAD ~ the engine } is automatically started without { TAIL ~ an operator request } to start the engine
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH