{HEAD ~ The entire operating cycle} comprising all four positionings of the person P in the area 190 requires {TAIL ~ about 60 seconds} 
{ HEAD ~ The entire operating cycle } comprising all four positionings of the person P in the area 190 requires { TAIL ~ about 60 seconds }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL